My experience with bug trackers is that people hate them no matter which one you choose. The infinite list of stuff you know is broken or sub-optimal crushes the spirit. (Jira is particularly bad, because it is slow and complicated, but switching to simpler tools doesn't make that underlying problem go away.)

When people complain about bug trackers, they probably need a new outlook on work. They need to aggressively prioritize tasks. They need to be in a mental state where they're happy working on the highest priority thing, not the most interesting thing. You can't get there by buying a new tool for $9.99 per user per month. You probably need a vacation.

At my last job, we switched from Jira to Github Issues to Asana. Each tool had the same problems -- bugs were filed faster than they were fixed. I am personally okay with that -- I know that most of these things will never be done, but it's nice to park the idea somewhere. But to others, it's crushing, and although people will complain that they don't like Jira's UI, what they really hate is that realization that they will never "finish".