All I play is Arena on Halo Infinite. This game has Froze and Closed on my Desktop over 10 times this week during a match. I have leveled down and de-ranked so many times. They need to add more error handling in their code along with stability fixes. This is honestly sad as a company. I also want to point out this issue is not just me, a lot of people are having this crash all the time on PC.
Trust me it has nothing to do with my specs don’t even start there. 
When are they going to fix this issue and add an actual AntiCheat?
I know for certain based off other peoples research that there is zero AntiCheat implemented right now. Sad.