Unfortunately, you have to many 1* players. Which makes your reputation a lot lower than what we are looking for.
This is to ensure top tier prize pool.
Average quality of your squad and your achievements last season. In other words, your achievements are A+ but the average quality of your squad *$@#! you over as far as reputation is concerned :(
This can be altered after joining. So if you join now and sack all your 1* players before 3 am. You'll have an outstanding reputation by 03:01 am. Harsh.. I know.