Like TasiaChaan said this is probably just somebody resetting their streak with weak fighters, BUT, I have had a victory against someone like this and assumed that’s what it was, only to come to this thread and see they’d been reported like ten times. So yeah, you can win against hackers. I usually still screenshot victories like this in case I see the person’s name pop up here, so I can contribute more evidence if need be. Most of the time it is legit players resetting but never hurts to be careful- just my little contribution
For Rift Battle reports, I'll need you to attach (or DM) a screenshot of your Options screen so that I can view your account details. This will help me find the specific fight that took place.