I think we'd need to know more about what settings you've used to play the game.
That is, how big a map you're playing, how many players, etc.
You also might want to try out the 3.0 Preview Branch on Steam as it has a lot of improvements.
For instance, on default settings, turn ~300 I get around 120fps on my system but I have a AMD Ryzen 7 series CPU with an NVIIDA 2070GPU.