What is there to say? You can't fix other human beings. Your main complaint is that other people don't play towards your expectations. The simple answer is that playing "sim" basketball is actually hard with a lot of difficult fast paced decision making. I would try to find some like-minded people to play friendlies with if you want a sim like game.
I think taking a break from the game is a good idea because it sounds like you're burned out. The game will always be available when you return.
So if you truly want to take a long break, sell off all your expensive players because your MT will be a lot more valuable when you return.
One thing to add, this year is far from perfect but I gotta give 2k credit for finally adding friend matchmaking and contract-free. Does anyone remember using those head-to-head challenges last year just to play a game with a friend's team? Atrocious.