I've never heard of any of these problems with RyanAir. They treat you as less than cattle and generally their service is shit, but I'm not aware of RyanAir being unsafe.
Actually, in a quick check it seems the total fatality count for RyanAir is zero, with only two (on-fatal) major incidents (2008, 2021). That's seems a pretty good track record considering the amount of flights they do.
Yeah there's a lot of hatred of Ryanair given their somewhat pugnacious attitude. But as far as I know they don't mess around when it comes to safety.