Tbh,I think most of that is bollocks
If you've paid for a seat you can check in sooner than 24 hours in advance
The only time I've needed a paper copy is recently,flying from Morocco& that's nothing to do with ryanair(though their Comms re this were dreadful),it's to do with Moroccan airports.otherwise,checking in via their app is a piece of piss
Walk on bag size of a napkin?again,bollocks.i was 7 nights in Morocco&had 7 nights worth of clothes etc in a normal sized backpack(22 or 25 litres),it was bursting at the seams but no issue whatsoever.
Ryanair have their problems but,unlike the aforementioned easyJet,at least they're,in my experience,reliable.ive had half a dozen last minute easyJet cancellations in the last 5 years,never once with ryanair