Diamond 3 (placement matches) vod review request: What could I have done?

I was playing sup this game and it was AWFULLLL. They were running double dive and I felt like I was just getting my teeth kicked in. I swapped to Luna to maybe output offensive pressure to dissuade the dives.

Ingame Name: FrEshAVocaDO

Plardoem: PC

Game Code: 10643593776

I went on a bit of a hiatus from sup to learn DPS and my duo says that might be the problem. Even when I was a sup one-trick though I've always had a hard time with dive, but this match was something else. I've been feeling kind of... upset because my peak was c2 but now I'm barely scraping by in dia lol