My team does a lightweight agile process, we don't hate it. If we used a better tool, we'd love it. We have Jira, and I don't have the energy to change it, nor do I want the responsibility to decide or suggest what other tool that should be. I've always used Jira, I have no suggestions ready. I'm sure it's easy to pick a simple tracker, like GitHub Issues, but I would not know if it'd suffice all our needs and if it would scale, and again, I don't have the immediate energy to invest time into that. But meanwhile Jira is slowly eating away at me. I think the general concepts are acceptable. It's just all the rough edges, all the stupid little design decisions, and its slowness that I hate (passionately).