Unfortunately tanking is the norm in this game because Managers are allowed to manipulate the game in this way without punishment. Many suggestions have been made to address tanking and remove it from the game but the fact is that it benefits Nordeus to allow it to continue otherwise they would have made it impossible by now.
My suggestions to rid the game of this menace:
1. Everyone levels up from 1-14 and loses 20%.
2. Get rid of the Top100.
3. Provide incentives for League position with tokens.