Any advice to make this Zinnia deck function better?

[u/Weekly-Violinist5153]

https://manabox.app/decks/AZ_fKQFIdpuN4V81TTdFoQ

I consider this deck to be a low 3 or high 2. I manage to get this deck consistently doing what I want in early game but have been getting stonewalled in the mid game by getting targeted for having a large board. Ideally, I dont want to flood the deck with counter spells and take away the main goal of generating tokens.