Uh oh, Brock Purdy. Your detractors are lining up.

The fellowship of Purdy Truthers can smell the validation. They prayed for times like these. Their contention this whole time is that you, the San Francisco 49ers quarterback, have been all hype, that you didn’t belong in the company of the game’s elite. They’ve been saying you’re only, well, you, because of the superstars around you. They’ve been eager to relegate you to a lesser tier, put you in line well behind Dak Prescott, Baker Mayfield and ’em.

Oh, you better know they are watching and waiting. And hoping. For your downfall.

They’re sitting up in their seats, Brock. Rubbing their hands together greedily, salivating after you couldn’t outduel your former backup Sunday in Minnesota. Their eyes, filled with gleeful anticipation, are fixed on you, No. 13. Waiting to see how you respond to the mounting adversity of this season.

Christian McCaffrey is already on injured reserve. Your offensive line is struggling in pass protection, even the legend Trent Williams, who missed all of training camp in a contract holdout. Brandon Aiyuk, who also missed all of camp, estimated he was at about 85 percent.

Now Deebo Samuel is out.

“Yeah, always when you lose real good players, it’s always tough,” coach Kyle Shanahan said. “But it happens all over the league, and it’s a huge part of this league and a huge part of this game. We’ve got to deal with it.”

Let’s keep it real, Purdy. You haven’t been the same without Samuel. The 49ers with you at quarterback are 0-3 in meaningful games in which Deebo doesn’t take at least half the offensive snaps. Your offense has averaged 17 points per game in those games.

The Purdy Truthers haven’t let that go. A trip to the Super Bowl, MVP-caliber stats, and consistent vouching from the superstars around you — nothing has curbed the criticism.

They’re calling you a trust-fund quarterback, a silver-spoon signal caller. They’re still saying your football career began in field-goal range and you don’t know about the struggle. They’re saying you can’t do what the likes of Lamar Jackson and Josh Allen can do — put a team on your shoulders, be the reason your team wins and not just facilitate a loaded roster, overcome the holes in the lineup.

This is about as close as you’ve been to that scenario. Even with the revelation that Jordan Mason has been as RB1, a lineup without McCaffrey and Samuel definitely lowers the fear factor in the defense. Which tends to ratchet up their confidence, and the aggressiveness. Especially considering how vulnerable you’ve been the first couple of weeks to turnovers. You’ve only got two in the first two weeks, but enough near-interceptions to make a defense hungry.

You can shut them up now, though Brock. OK, maybe not shut them up. Beating the 0-2 Los Angeles Rams and winning at home over the New England Patriots and Arizona Cardinals won’t quiet the mob. But certainly, losing any of those games will increase the fever pitch.

It doesn’t matter how many dimes you throw. Or how big your numbers get. They’ll still see every time you make a questionable throw, or look a little lost, or miss a target. And the defense is getting better at figuring out how to give you problems.

It looked as if the Vikings, in the game we won’t speak about, picked up on a few tendencies the Baltimore Ravens introduced last Christmas. Anticipate and jump on the timing routes and bring pressure from random places — all designed to get you hurried and frantic, which is when you’re most prone to mistakes.

“No, I think that’s what the point of the scheme is,” Shanahan explained. “It’s to have six guys up on the line and come from everywhere. … It’s just a lot of pressure on a quarterback throughout a game. That’s what their scheme is. They’re going to make you think whether you’re hot every play, and if you’re not, then you’ve got to find the open zones. There are a lot of open zones, but it’s tough the way they slow you down. … (Vikings defensive coordinator Brian Flores) does a really good job of mixing it up, and that is the challenge for a quarterback. It makes it really tough to get into a rhythm.”

When you told Flores his “scheme is crazy” after the game, the Purdy Truthers didn’t see that as a young QB who appreciated being challenged. They didn’t see it as game recognizing game, that it was a sign you’d dive into the film to learn from it. Nah, they saw it as some kind of confession you were overwhelmed.

That’s why you can’t lay an egg these next few weeks. Well, you can. Because Super Bowls aren’t won in September. Sure, it would put the 49ers in a tough spot, maybe even cost you a home game in the NFC Championship, should you make it. But your squad is perfectly capable of rallying late and peaking at the right time.

So you can’t lay an egg because you can’t give the detractors more fodder. Truth be told, you have a legion fighting for you on the interwebs. Plenty are rocking with you Brock, and they need you to shut everybody up.

You’ve still got George Kittle. You’ve still got Mason and the power running game. You’ve still got Aiyuk, who is due for a big game.

“There were a number of times he had a real good chance to get the ball,” Shanahan said of Aiyuk, “and a couple times protections broke down on two of them. One time someone busted a route and just got in the same way, so they covered it up. But he had a chance to get about four big passes and other factors happened. It’s a team game. There are 11 guys out there that are involved in getting someone the ball. He did have some opportunities where he should have, but not everything went right.”

You’ve got enough to win. You’ve got enough to lead your team through this rough patch. This was always in the cards. Getting back to the Super Bowl is a daunting task. And NFL teams are like crabs in a bucket. This was always going to be hard.

Yet necessary. This is the hardship they said you can’t handle. This is the cape they believe is too heavy for your shoulders. They don’t believe you’re one of them ones, Brock.

You better show ’em.

GO DEEPER

Nothing easy for Brock Purdy as Brandon Aiyuk, 49ers offense try to find their feet

(Top photo of Brock Purdy during Sunday’s game against the Vikings: Stephen Maturen / Getty Images)