It’s unclear to me what’s exactly wrong with Ubuntu. Can you please give some more explanations on what you mean with “ruined by corporate interests” or “snap”?

It’s unclear to me what’s exactly wrong with Ubuntu. Can you please give some more explanations on what you mean with “ruined by corporate interests” or “snap”? Why do people say it’s not pure? How does it affect me? So far everything seems nicely enough documented and works mostly conveniently out of the box.