Direct strike game , I was at level 110 now I am at level 9 what the hell happened?
You probably entered a hacked lobby. There are a few bots running around with data injectors. If you enter a lobby with them (or a lobby where they entered at some point), the game will delete your progress.
We don’t know the extent of these injectors, but in theory, they could lock you out of your account, flag your anti-virus, or mess with other files. Right now, I would suggest that you stick to private matches to be on the safe side