Since the previous update, my Halo MCC on PC won’t allow me to get into matches. It just says looking for matches and I’ve timed it and it lasts like that four 1 hour and 41 mins before I backed out. I uninstalled and reinstalled the game and still experiencing this problem. I’ve changed the Network setting based on suggestions on YouTube and Waypoint. Still nothing, it’s like this for all game modes I’ve tried every single one. I can play the campaign and my friend can join me but when it comes to multiplayer it’s an endless waiting game.
Same this has happened to me but I am able to find "one match per game launch" and NO I'm not making this up. I can search for a match (with longer loading and search times since last Tuesday, which is when my issues started) and when the match ends I get repeatedly kicked from the search screen to the matchmaking lobby and every time I hit search I get booted back. Here's a very thorough post I made on reddit.