Teachers who left or are in the process of leaving early on in their career (I.e., during or after student teaching or within the first few years) what was your reasoning?

I'm so curious to hear everyone's perspectives! For me, I knew early on things weren't going to change and the job itself would only become increasingly difficult. I knew as I improved my teaching skills and abilities I would be rewarded with more responsibilities (spoiler, I was right lol) Thoughts??