Also welcome to PC gaming. Nothing is ever good enough for pc gamers.
Buy from a reputable company, make sure stuff isn’t soldered onto the motherboard for some dumb reason, and chances are it’s okay
People love to talk shit. They think it makes them look smart. So there’s always gonna be some dick with something negative to say.
A lot of people that perfect get in the way of good enough. You just need to know what’s good enough for you.
A lot of the criticisms people have for pre-built gaming PCs is the fact that the consumers of those machines don’t know enough to fix any problems. There’s a huge difference between knowing that there’s something wrong, and just suffering and silence.
Whatever you buy benchmark it with your favorite benchmarking tool and make sure you’re getting results roughly in the ballpark you expect. If not then you’re going to have to debug the system. Which I know you’re trying to avoid by getting a pre-built but you’re going to have to do it anyway