" I also think happiness is a clear delusion and illness."
You seem to be playing an “I dare you” game which entails your requesting advice and then shooting down the advice you are given in grand fashion. Sort of an “I dare you to come up with even one idea I’ve not already thought of.” And since you are certain that you’ve tried it all and, anyway, you know positive affect is just hidden negative affect, there really isn’t any way for anyone to be helpful.
But being so sure isn’t making you happy. Maybe you should try being less certain and realizing you probably don’t know quite as much as you think you do and you probably have not tried everything being suggested, at least not with the goal of succeeding. Stop shooting down every suggestion you are given. Instead, read each one and consider how you can force it to work.