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Ryanair is a true pay to win experience.
During booking process, preset options are aggressively trying to nudge you into some premium service. (eg seat reservation costs extra and if you don't do it they threaten to separate seat assignment of others booking with you) Their included carry on is half the size than normal airline standard.
During the flight, the staff has to go through some humiliating product advertisements.
Seating experience is sub tier.
Worst: They are cheaping out by using middle of nowhere airports and giving false impressions about that online. Eg. they used "Frankfurt-Hahn" as one of their main hubs but that airport is nowhere near Frankfurt.
But yeah, good safety record.