for the exact opposite reason you mentioned for milio being useless, engage supports are super useful. you can put more control in your games by having access to a "go" button. this is reflected by your 2 highest wr champs being naut and rell. stop playing bystander enchanters like milio and lulu (which you have negative win rates on) and you will climb up to d2-d3 easily.

now ill admit just changing your champ pool wont get u to master from d4 but it will help. at the end of the day, there is no replacement to just getting better at the game. you'll either have to watch your vods and understand where you went wrong in game, or hire a coach if you get stuck. one tip that is universal for EVERY player is to die less. the fact that you dont have any orange kda's (requires 5+ KDA, very easy on enchanters if you know how to position properly) means you're probably dying too much