About to give up Halo 5 mp, matchmaking is broken

The game was working ok in the first days, but after 343 made “adjustments” to the server they broke my matchmaking.

Its not a surprise Warzone just wont work for some regions, Brazil included (Im from Bazil), but it has been like 2 weeks I cant play the game anymore, even Arena.

I just tried to play the game for about 1 hour and didnt find a single match. Tried all playlists.

Im about to give up Halo 5 multiplayer, which is a shame because I really like the game.

Ive tried to contact 343 in various ways, but they simply ignore me.

Im starting to think this game will die fast. Sad for Halo community.