Your complaints are not unique to American schools, Slovovoi. I taught in a polytechnic for six years (and before that two years at a university), and the administrative pressure is unrelenting. I became what is known as a "course co-ordinator", "program leader" or "Studies Supervisor". The title changed every year that had a number in it. The reason the CEO (not Principal or anything academically-related, you notice) appointed me was that I turned out to have a knack for satisfying the demands of the external accountability vultures who were always hovering over us without our really having to do anything much. It's all in the words, don'cha know?
After a year or so of doing this, I found that I had been completely relieved of my teaching load. To make up for this I developed a new degree programme and a number of other programmes for our IT department but even this palled after a while.
Like you, I wanted to teach, but the system demanded that someone stave off the hordes of philistines who were tireless assailing the walls. And like you, I escaped in the corporate world, where I rapidly doubled my salary and my levels of work satisfaction almost overnight!
And, again like you, I find it highly unlikely that I will ever subject myself to that regimen again.