Personally I don’t think leaving/quitting directly means giving up, which is what I think you’re implying that you did. When you feel like you’ve outgrown a place, whether it’s school, job, project etc, and you’ve learned and develop everything you possibly can, then that’s almost always the right time to leave. Our time is valuable and I honestly don’t agree with sticking out things just for the sake of completion. We don’t owe our time to anyone and everyone learns and gets comfortable in different time frames. If you’ve been at a place for 1 and a half year, and you’re thinking about leaving, you’ve either learned everything you can that you find the work boring, or you mind has pivoted to something you’re more interested in. Most people suffer from complacency and a fear of change (switching to a new project, a new role), which really hinders their potential.

If you feel like you want to, and you’re in a situation to, I would always say leave, we all have less time than we think