Well, I had the same issue decided 2k16 wasn't for me. Also been playing since dreamcast also. Too much hand holding this year on defense to the point I was playing more off ball than I ever have. Which felt as if I am fighting with my own teammates.
But the bigger issue for me being offline is when I am on offense and the cpu defense "gives" me points due to gawd awful help/transition defense. No setting/sliders i have test it can overcome that issue.
All I can tell you is just lower your expectations and adapt or trade it in. I did the latter. It was hard but like I say Beyonce wasn't putting out so she ain't doing me no good [emoji6]
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