Get taller point guards. I know Murphy and Thomas have good stats but there height makes them unusable in 2k.
Pick up PD magic he is 11K and maybe diamond Giannis at Point guard
PD penny hardaway is cheap now. You could think about him.
All those little guards are gonna get you killed online dude. Thurl Bailey is a solid budget card to add shooting and length to your lineup
Get some backup bigs like Greg Oden Paul milsap Marvin Bagley and big up new starting guards like Charlie Scott (9k) and Brandon Roy signature series 98 (20k)
My lineup (https://2kmtcentral.com/19/lineups/87029/suggestions)
I wouldn’t keep Thomas Giannis with post then up
michael porter jr., thon maker, mo bamba and jhonathan isaac. all really cheap beasts. Also, there is a hidden broken card since the start of the game, which i still use. Drazen petrovic; when I get the ball after my oponent scores, I just wait the moment till I pass to him, wide open between the 3p line and the midcourt and bang; always green or almost green uncontested easy 3p. You just have to master his realease, and I have to say, he is even better than limited kobe. Good news, he is cheap af nowadays.
Also, pick up Paul Milsap.