I've found the opposite more often than not: Users are nice, but the maintainers are arrogant, unwilling to listen to your issue, close the issue without explanation, disrespect you for bringing something that breaks their product or shows a major flaw, nitpicking until cows come home with PRs, rejecting PRs for no reason at all (screw you for putting all this effort in the PR, right?), god-forbid if you ever talk about any drawbacks or issues with the license. Users are usually nice and other users moderate them if a wild one appears.

Can maintainers please be nice?