Bless you my darling ❤Only people who have been through this will get it. My DD displayed some similar behaviour for several years. Singing the praises of her friends mums and her boyfriends mums... (And their dads!)
This was when she was at college and her first 2 years at uni. We are working class and were financially poor - so poor that DD got full help with bursaries and grants and all kinds of stuff. (We are a bit better off now but were really struggling then.)
DH was working 26 hours a week in a local chain store in town, on minimum pay - lost his well paid job he had been in some 2 decades when the factory shut down, and had to take what he could get at the time.
I worked part time (16 hours a week,) as I had not been in the best of health for several years, and we got by, but weren't well off. Never asked anyone for anything though and paid for everything ourselves.
DD was smart and academic (still is) and she went to a 'good' uni. There were some posh middle class and upper middle class people there, and whenever DD came home for the holidays, she would say 'Hugo's dad is in such a good job, and he travels to 20 different countries a year with his work, and he has a flash £50K car,' and 'Harriet's dad has such an amazing business of his own, and he has smart suits and a lovely car, and he just breezes in when I'm at her house, all happy and 'heyyy girls!' I was like 'okaaay...' She continued... Yet my dad doesn't seem to have the same ambition to do well in any career. Why is he so dull and uninterested in furthering his career and doing better in life? Why the menial jobs?'
I was so angry and upset with her. I didn't show it though, and just said (with a frown) 'well YOU never went without, and had everything you wanted, and he and I never asked for anything off everyone. His 'menial jobs' gave you everything you wanted!'
She said 'oh I love him and all but my friends dads seem to be more successful in life, and have loads of friends and more hobbies... My dad seems a bit boring in comparison.' I said 'He is not THEM, he is his own person. Remember these 'dads' are not at home half the year. YOUR dad is always there for you! And many of these dads very likely had a better start and more advantages in life than yours.... AND you're only seeing their best side!
She was basically comparing the fast living trendy career driven dads of her friends to the boring (in her opinion) unambitious, oik (with hardly any friends,) that is her own dad! SO hurtful and rude. I never told him, and he still doesn't know she said it. She also berated our 'small' house a few times and compared it to her friends parents 'mansions.' 
Ten years on her attitude is different and the snobbery she had has gone, and she is a different person. Kind and thoughtful and lovely.... But I often wonder if she remembered these few conversations... She was so rude! Especially about her own dad! Even though it was him she had a go at, I felt really hurt - for him. He is the love of my life and MY husband and HER FATHER and she was so cruel. I know she was only 17-20, but FFS she was brutal! I started crying too when I dropped her off at her friend's house. I was upset for him!
She ALSO seemed to prefer her friends mums a bit too for a year or so (when at uni) and told me a few times about her successful, trendy, slim and fit mums of her friends. (When I was in a bog standard job, chubby, and wore jeans and a polo shirt...) Felt a lot like she preferred them to me, and it did hurt.
I can imagine you are VERY hurt @DarkandStormy77 and I have no answers for you. Only sympathy and empathy. And I am sure it will pass, as it did for me and DH. DD is a dream now, and has only lovely, kind things to say to us and about us now. 
Thankfully!
Could you talk to your son about it?