Ryanair does not only have dark patterns on its website, but also within the company.
Two months ago there was a program on Dutch TV where a couple of Ryanair pilots anonymously stated that Ryanair flies with dangerously low fuel to keep costs down. Here is the video with english subtitles:
While this hasn't lead to an accident yet, it has lead to several mayday calls when planes had to fly to another airport due to weather conditions or had to wait in the air because the airport was busy. The airport had to let Ryanair land before its turn. If the other firms that had aircraft landing at the airport had been flying with similarly low fuel it would have been a crash.
Charlie: Ray, all airlines have crashed at one time or another, that doesn't mean that they are not safe.
Raymond: Qantas. Qantas never crashed.
Charlie: Qantas?
Raymond: Never crashed.
Charlie: Oh that's gonna do me a lot of good because Qantas doesn't fly to Los Angeles out of Cincinnati, you have to get to Melbourne! Melbourne, Australia in order to get the plane that flies to Los Angeles!
In Bulgarian we often call it that way. Also, their National Football team - Eire, without exception. I thought it's an abbreviation EIRE, but now I see it's not. Interesting :)