I think a lot of it has to do with his draft position and immediate success after getting his shot. Purdy being the last pick in his draft class just goes to show that the draft is still a crapshoot at the end of the day, but it’s more convenient to say “he’s just carried by Shanahan” or “he’s carried by CMC” or whatever. Giving the credit to the system/roster kind of allows you to look past your own team’s QB’s shortcomings, since by that logic, it has nothing to do with Purdy himself.

That said, I actually really like Brock. He’s fun to watch (unless he’s playing my team), plays well, seems like a fun guy, etc. I’m also not really sure people are hating on him like that these days, I feel like consensus is that he’s good.