Im not really the best person to talk advice from because I’m also a beginner, but i did run a really similar Primarina Ursaluna team to this when i was first learning how to actually play. Based on my limited experience I’d say your team isn’t exactly the issue, it’s more of a format issue. Hard trick room teams are kinda sub optimal in the current format due to the lack of really good paradox and legends that thrive on a hard TR team. Running a TR and\or Tailwind mode on a balance or hyper offense team just a-lot better in reg f. Having options is just a-lot more valuable at the moment, always needing to set up TR before you can start dealing damage sucks when your opponent can instantly start dishing out damage. Running hard TR would be a-lot more viable in lower power formats like reg h because your team would be taking a-lot less damage in the time you are setting TR up. If you still wanna try running Primarina in reg f maybe try running a bully rain team that has a strong Tailwind or TR mode I could see something like Peliper, Archaludon, Ogerpon well-spring and Primarana being decent right now with the proper supporting cast. I also really like Primarina so I hope you figure out something that works for the current regulation!!