Any suggestion that Ryanair's operations and maintenance match their customer service is total rubbish. I can say with absolute confidence, from personal knowledge, that their standards in those departments is as good as and probably much better than any other European or US airline. There is no penny-pinching on maintenance, for the very good reason that almost any expense incurred to prevent a delay or on-route technical diversion is going to be a lot less than the cost of said delay or diversion.
That's not to say that money is wasted. It isn't. But good purchasing, good stock control, good maintenance control, good recruitment and training, excellent quality assurance and financial care add up to good management, not "penny-pinching".
I know of legacy carriers, not a million miles from home, who are so far behind Ryanair under all those headings that there is no similarity of standards whatsoever. But they spend, and waste, a fortune on maintenance, measured per CTK produced, with no visible benefit in terms of standards and quality. But they have a lot of very, very well-rewarded Managers and Directors, together with the useless entourages that these people gather round them to protect them from the real world.