If you had a good experience in school, I'm happy for you. Just don't assume everyone else did.
I was homeschooled because of bullying that the school failed to do anything about. Incidentally, I ended up a secondary math teacher with a math degree (and by the end of this summer, an MS in mathematics). I can tell you something from the "other side." First, some districts are basically little hell holes that can't keep staff. I could talk your ear off about this, but it sounds like you ended up at one of "those" districts. While it may feel good to stick-it-to-em about pay, those districts are hell holes partially because the pay is so low. If the pay were competitive, it'd be easier to replace ineffective staff. As the saying goes, you get what you pay for, and you were on the receiving end of "what was paid for."
Second, research from Stanford suggests that complaining causes brain damage. I suggest you stop while you're ahead! ;)