@GiSe87 Unfortunately, even myself as a gold member can attest to not enjoying the game. You'll be very lucky to get a refund.
You bought the ultimate edition knowing they would add specialists and not knowing what you would think of the game.
Think of it as buying a pair of shoes, wearing them outside a few times and then taking them back and asking for a refund.
You have two options in my honest opinion.
You can either wait to see what changes are implemented, see what they do with the game and make a decision on whether going forward you want to purchase more BF or even EA titles.
Or you can just uninstall the game, not buy any more titles and ignore the fact that it released.
Letting this live rent free in your head is silly, go and play other games that have been released to good community reviews.