Put simply - This is the opposite of fun, it is frustration.
The create a player/MyCareer is purely pay to win. If you do not shell out the money in addition to the purchase price of the game you will spend countless hours grinding for badges in a pay to win system that actively undermines your attempts to win so you feel compelled to buy the in game virtual currency. Examples include matching a 60 overall against a 94, subbing you out with a 4 point lead only to come back in being down 15.
I have played other 2k career modes but this one is the worst. As a 60 overall (starting point) you will miss wide open shots regularly, have 0 defense, and if you attempt a dribble move you will turn it over. You have to hope and pray that your teammates will score so you can get assists or else you will just be a screen guy the entire time.