[2022] Big Team Snipers: friend was banned for being bad at the game?

So I've played Halo for years and recently roped a gamer friend into joining me. She's been having a lot of fun but isn't the best at shooting because this is her first online game and she has limited FPS experience. She's getting better but tries to focus on playing objectives and melee when possible.

We ended up in a Big Team Snipers battle. Scoped guns in particular are her weak point so she wasn't doing well, tried to hide and be sneaky so her deaths wouldn't impact the team too much.

She ended up with 0 kills and 11 deaths and was temporarily banned for "unsportsmanlike conduct."

Usually she laughs off her bad matches and celebrates when she improves, but now she's feeling self conscious and is worried she'll be banned in the future for not being very good.