I need some advice.

I need some advice. I have worked over two years of a company and there has never been a time when the department I work for is not being restructured in some way. I still reach my goals. These year I went down to part time hours and was assigned an assistant per say to help me out. However, I end up correcting most of the work of the assistant and if the work even gets done in the first place. I voiced my concerned to two manager over the span of almost 8 months and very little has changes. I have voiced some inefficiencies when asked if there is anything that is is holding my department. However, they are also never addressed. I was promoted to a "manager" position but never treated as one. Other managers get to interview who works in their team I just get people assigned who don't have the skills needed to get t he job done. I stick around because I am allowed to work parttime and remotely from another country and feel many other jobs wont let me do this. However, it is a role where I am doing now 100% the opposite of what I was hired for and while initially I enjoyed the being able to learn new skills because of it. For over a year I have not learned any new things. Also the pay is ok but for my skills set I have looked up other similar job and they are paid better then I do. Should I stay or should I go?