Brand doesn't even need nerfs
I've been playing this champ on and off since s3 and I tell you - now is probably the worst time to nerf him. Trust me. Nerf the keystone he is OP with, not the entire champion.
Is it the stun you're concerned about? He has to hit you with a different ability first and have you burning in order for him to stun you. If he does hit you with a burn, just get behind a minion until the burn passive stops! Just creep block his Q. If you're chasing him, be mindful of his cooldowns and don't "YOLO$WAG HES DONE 4 BALLS DEEP" him just because he got caught out, if you really want to chase him dont be an idiot, just strafe away from his Q.
Is it his raw damage? This has literally been unchanged for pretty much ever.
Is it the items? His items were nerfed, cost increased and stat reduced.
Is it the masteries? Yes. Nerf the mastery. But don't nerf the whole champ.
Just because you're bronze and don't understand how a champion works and how fighting him works with your specific champion, doesn't mean he's OP. It is literally the same case with Yasuo and Illaoi.
You want to piss off a Brand main? Just play Zed or Kennen