why does software suck

why are game developers the only people who can make reasonably fast and reliable software

i guess also operating system developers

Laggy and ugly games don't sell, so bad developers who come up with those end up unemployed.

The good programmers who optimize their software and deliver a better product end up with good profits.

So it's natural that competition keeps mostly the good stuff.

Of course there are lots of variables and it's not that simple. Bad programmed games can sell if they have amazing story, if it's COD 17 or FIFA 2019 (games people can't stop playing because they do so for a long time), very simple but addicting games, etc...

But as a rule of thumb bad developers lose their jobs and good developers keep making games.