Star wars fans hate TFA for reasons that elude me.
I'm with you, TFA was cool. I wanted to know more about the knights of Ren. Kylo was interesting, here is a villain who is struggling with using the dark side, but is trying to commit to it. That's something we don't see ever. Finn was a neat character, and another new perspective.
I think the Rey hatred is actually misogyny. People don't lose their minds that Luke is best fighter pilot in the rebellion, but Rey uses the force in the "wrong" way and she's an unredeemable Mary Sue. I'm not one to cry discrimination, but the amount of venom targeted at the character implies something deeper.
I too gave up after TLJ, it seemed designed to make me stop caring about star wars.