I have never met "rude, unhelpful, very cold" Ryanair cabin crew members - I don't meet any other Ryanair staff, as I always web-check.
I have often met Ryanair CC who were very helpful with people unused to flying or old or somehow in need. Many are quite cheerful. (A recent exemple : "Karim" on CRL-TRN yesterday).
Of course, if you are a frequent customer of the best first class on the most luxuous carriers, you are bound to be disappointed by Ryanair. As I am a frequent customer of Belgian bus and train companies, I feel differently.