I must be in a minority. I have used Ryanair more time than I could possible count and they have NEVER let us down (unlike some other airlines).
You know what you get with Ryanair and you know how tightly they interpret their own rules. We've found that as long as you abide by these, you can't go wrong.
I'm a bit angry with them for forcing me to buy seats (as we have a 13 year old). If you don't, the automatic seat allocator spreads you around the plane. Not very helpful during Covid for one, plus why sit a 13 year old next to a stranger?
Anyway we cough up another £11 each to sit together, so they've made their damn point.
I want to add that they run a tight ship and were the only airline who brought us home when there was an incident on the runway at Alicante airport just before the pandemic. Everyone abandoned their customers (9 hour delay) except for Ryanair who picked us up and took us home. I haven't forgotten that. Plus they are always very punctual!
You know what you get with them.