Yes, the older Chromebooks have some terribly inconsistent trackpad experiences. There is an older Acer model (circa 2017) that had one of the worst I've ever seen... way too sensitive even with the settings adjusted, palm detection didn't seem to work at all, and after just a month or two of normal use trackpads started double-activating (we had a whole fleet of these!)

Newer models are better. I'm sure software updates have fixed a lot of the palm detection issues. But similar situation with Windows laptops, PC notebook manufacturers are 20 years behind Apple on trackpads.