I think I read that BFG was the only one in the Union team that refused to take a paycut during the Covid crisis. All the other member of his team took a 10-20% pay cut that was used to pay ground staff etc. He refused and was sanctioned and told he would not play for the club again
"On 28 May 2020, Union Berlin president Dirk Zingler announced in a statement that Polter would not play for the club until the end of his contract in June, stating that Polter was the only member of the club that did not "stand up for each other and for our club."
So, knowing no more about it than I have written, and that there may be facts unknown........maybe he is not such a good egg afterall