Why do you care so much about what others are doing?
I used to tilt a lot in DM because of stuff like angle holding, crouch spraying, oping, etc.
Then I just realised, why do I care so much about what others are doing. If I'm in there to warm up, I just do my thing. I'm not playing to win, I'm just trying to warm up a bit.
So I put some music on, and chill. DM means nothing in the end. Just ignore what others are doing, even if they're spamming an odin, or spectre. Just focus on yourself and your own gameplay.
After while you become numb to the people trying to win a DM so hard, just so they can go lose their gold3 rankup match.