Hi, gm here.
Your gameplay is far from a casual diamond player.
I would suggest Master.
It look like your team is far less skilled and coordinated than the enemy one and that you’re the only one using your brain in it.
I think it’s again a matchmaking problems. The game put you with bad player against medium skilled player and hope you can carry them.
It’s called handicapping MMR.
it’s not because you’re a Doomfist ot.
One tricking is not a problem bellow T500’s rank because you’ll always be able to play versus your counter. For example a lot of people can achieve high T500 in SoloQ by one tricking Doomfist without any problem.
Of course it can be a problem sometime but this is not the topic.
Your gameplay seem master for me. i recommand you to just try to improve and have fun, maybe another day you’ll be able to carry your team. But for now you’re not able to.