Clearly the evidence and your statements are in contradiction.
You didnt remove wireguard as the peer settings were still there.
You didnt remove ether10 DMZ as you named it from the bridge it was still there etc.
Without a clear set of requirements, which you keep changing or informing in dribs and drabs, I am unable to help further, as I am not savvy also in output chain rules.
Perhaps others will have more skills!