You should just need to block the community. There’s a 🚫 symbol on the sidebar of a community, just click that and the posts should stop showing up on any of your feeds.

If you’re on mobile, the formating is kinda fucked so you’ll have to scroll to the bottom of the page to find it.

Based on the track record, they might not be the ones to whip Activision/Blizzard in to shape.

Honestly, I have my doubts that even call of duty will survive this.