I don't think I'm good at Toribash. I just have a "it is what it is" mindset when i play nowadays.

I have like 4k+ hours, and 75% of that is in Boxshu LOL. (Most of which i am not proud of)

To answer the question, is it worth grinding the game still? it depends on how you feel about the game since you've started playing and the relationships you built with the people involved in the community.
Everyone's perspective is different obviously. I can see it as being worth the grind, If you love physics.

I can say it's not really the game you need to feel as if you need to grind. , It's more-so the community you have to build with, as you are putting time into it, that makes it worth it.
However, depending on how much you love Physics and Fluid motion. You can't really factor in, "Is it worth the grind". If you enjoy the game and it's community, It's pretty much answered for you.