@ilmari150 The development of the game has been stopped like half a year ago, things like this are probably not going to change. However, BFV is just using the avatar from your EA-Account, which you can change here:
https://myaccount.ea.com/cp-ui/aboutme/indexIf you are having a problem with the avatar in game, you can disable player-created content in the ingame options>Gameplay>Basic>Player-created content