I've played 3000+ games of competitive Halo Infinite over the last year while climbing to top 1% and only had 1-5 games with noticeable cheating. It's nowhere near "ubiquitous and rampant". In the singular game with blatant aimbotters, it was actually a really close and exciting game because while their aim was perfect, their strategy and game sense was atrocious. So with good communication and coordination on our side, we were able to outsmart them and win.