Dude, first of all, calm down.
I get that the game's quality is..... questionable at best, but isn't it too early to jump the gun?
What if this is the dev's first game? We all learn via trial and error in our own way, so being this harsh is completely uncalled for.
Especially that last part about having to "rethink your game dev journey".
Plus, it's a game jam, and there is nothing wrong with using existing assets as long as the dev have the rights to use them and as long as they weren't stolen.
Sheesh.😑