Kenobi was a Boomer
Owen was Gen X
Luke was a millennial
It all makes sense now. Think about it.
Kenobi's generation of Jedi got to live fat and happy off the success of the previous generations of Jedi which had brought and maintained peace and order throughout the galaxy through great sacrifice. They spent way too much and and built unsustainable programs the galaxy couldn't afford. Owen's generation got stuck holding the bag when it fell apart and actually had to get up everyday and work and live within their means. Luke's generation knows nothing about the sacrifice of the older generations of Jedi, they resent Kenobi's generation for essentially bankrupting the galaxy leading to the Empire taking over, and they think Owen's generation is boring and lame because all they ever do is work and tell them no. Luke just wants to skate by and chill with his friends at Toshi Station and whine about how hard they have it. Luke, with literally no flying experience thinks he's a better pilot than Han, then gets all butthurt on Yavin IV when Han isn't down for the cause and just wants to get paid (yeah, that's why we're Gen X and you lived with your aunt and uncle). Then when he does get the opportunity to train to be a Jedi (with none other than Master Yoda mind you) he second guesses him constantly, argues and questions him, and leaves his training early. It literally takes his own father lopping his hand off to square him up and take some responsibility.