I make coffee everyday. I brew about two teaspoon of coffee once a day, sometimes twice.
I’d say I’d never generate too much coffee ground as it’s really easy to handle. It pretty much has everything it needs to make compost, yet it can also help other stuff too, be it onion peel, banana peel, green onion bottom, eggshell, ash, you name it!
I recently found that it really goes well with leftover fruit pulps. My wife likes to make juice and would filter it sometimes. That leftover would then sit there fermenting for a few days. In a few days the spoiling fruit smell disappeared. I think I found one of the best combination I could find!