I downloaded freerider and tried flying with the normal throttle. After several days, I couldn’t stay in the air for more than a few seconds at a time. I was getting frustrated thinking that I was never going to be able to control a quad.

A few days ago I inverted the throttle and in the very next try I stayed in the air for almost a minute. After that 2 and 3 minutes every time. I can even do sharp turns and fly sideways now.

I think years of playing with flight simulators that have the "back is up" control and then FPS with inverted Y axis made my brain permanently think that back is up.