Can I remove my BattleTag if I don't use Counterwatch?

Yes. Counterwatch records in-game identifiers like Overwatch BattleTags and Marvel Rivals ids for players seen in tracked matches, even if they never installed the app, to build community stats. If you do not want yours processed, you can object or request removal on the Data requests page. Include the game and your exact in-game id so the record can be found. Because deleting an unverified id would affect someone else's data, you may be asked for more detail, and you'll get a response within one month. Payment records are kept for about 7 years under bookkeeping law, and copies in backups age out on a schedule rather than being edited individually.

More detail is in the Privacy Policy.