And if you don't like that? Well you can kiss my arse.
A generous offer but you'll forgive me if I pass.
The issue that is causing you so much grief is the same issue that affects many popular jobs. If you want a job as a ski instructor, a flotilla sailing skipper, a dive instructor, parachuting, gliding, white-water rafting etc etc you will find that you get plenty of responsibility but not much pay. That unfortunately is the name of the game. If the activity is popular people are willing to do it for not much money.
If you add in the hour builders who are doing it as a means to an airline job rather than as a vocation and the professional pilots doing it between jobs or because they enjoy flying light aircraft in their spare time then it makes lfe very difficult for someone who is a committed professional career instructor. This isn't a new phenomenon, it's been like that for years and would certainly have been like that when you got qualified.