If you feel the intent coming from him, try screenshotting a picture of scoreboard next time to verify that you don't have 2.5k+ crime. Not much can be done because of the lack of evidence though.
Pictures can only do so much. If you can get your hands on some nice screen recording software so you can record gameplay. Recordings are a lot better than screenshots so if you can, it would help your reports a lot.
Jamal recommended "ShareX" because it can do pretty much everything. But google can help you out a lot too.