There's so much good open source software that I'm not even annoyed at how wrong your statement really is.

Sadly, yes, you're not wrong. However, have you seen the quality of most proprietary software? No, you haven't, no one has, because it's proprietary.

> Most of it is about people pushing their own agendas and self promoting

Perhaps, but some of it is not, and that is the difference to proprietary software.