cant play multiplayer due disconections

hi i have an issue its neen 2 week by now, havent been able to play on steam MCC, cant play multiplayer due disconections immediately after loading, ive been banned from queue too many times trying to fix it, i uninstalled the game, downloaded everything from start, restarted internet reuter, asking my ISP to reset configuration, what else i can do?

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Sounds like one of the known issues listed on the Halo Support site:

The issues in this section are being investigated further because of tickets players submitted to Halo Support.
For the first three issues below: if you encounter them, please submit a ticket with info including a timestamp for when the issue happened, the game mode, and the map. This will help us investigate them further:

  • Rarely, a player can be disconnected from matchmaking after loading the map but before the gameplay starts. This also results in a short temporary matchmaking ban. - Rarely, players can be “dropped” mid-match and are stuck on a loading screen until the match ends. - Players can be kicked from matchmaking with a “Leaving…” notification as soon as the lobby is full.

its not rarely, its every single multiplayer (even firefight) match in the last 2 weeks, not mid match, i havent been able to play

That text is copied from the Halo Support site. I’d suggest following their advice and submitting a ticket