I think something people might be missing is the context around this post, which is that the founders are being dragged on twitter, essentially.
Since a lot of you hate the site, I'll summarise briefly: one of the founders did a thread starting with the following post:
"
I just quit my 270 000$ job at Coinbase to join the first YCombinator fall batch with my cofounder @not_nang
We're building PearAI, an open source AI code editor. Think a better Copilot, or open source Cursor. But you've heard this spiel already...
"
One thing not conveyed here is the first line is in unicode bold and the end is littered with emoji spam. Essentially, the post ticked a few rage inducing boxes for a certain kind of tech twitter user. It was rather cringe, reading like a thread from get-rich-quick influencer types while also likely imbueing some readers and quote tweets with a little jealousy they wouldn't openly admit. This was probably the impetus that pushed one or two angry people to poke around their product and find out about the open source code cloning and the fact the founders were overselling (which founder doesn't, I guess...) which lead to a rout of publicly mocking them and YC in general, resulting in blog posts like the OP, I guess.
I personally don't really think one company amongst the whole batch is enough to judge the start of a trend for YC "trading prestige for growth" or whatever. I think the discussion of prestige is in general is an interesting one, I just don't think PearAI is indicative of it more than they themselves just being hucksters which happens in tech in general.