Holay, gucamolay.... My heart is breaking reading your experiences.
I'm a regional referee in AYSO. If some of the posters are talking about AYSO (playing out of age division, coaches who are win, win, win, parents pacing sidelines....) I would be screaming to high heaven at the regional coordinator. All of that kind of behavior and activity are gross violations of the national rules and bylaws. They're inexcusable and need to be reported at the national level.
Our dd is 8, plays U10, it's her first year and she's a beginner. Her coach is so psyched to have a two beginners on the team. At the team meeting, she was emphatic with the parents that while U10 is competitive (i.e., it's a tournament for a trophy) winning is meaningless if even one player is not having fun and learning the game. We had to sign a contract with her that we supported that philosophy and would not interfere with it or we would withdraw from the team. She's one of the most successful coaches in our region... success defined as most beginners trained with basic to intermediate skills, highest level of player happiness, etc. One of the parents had a win-win-win coach the prior year in U7 and that coach was actually replaced mid-season because of it.
As a ref, on the pitch our region has a zero-tolerance policy for negative behavior by anyone, players, coaches, especially parents. If a parent ever paced the touchlines like that, they'd be escorted to their car. As a ref, I have the authority to ensure that such a parent is removed for such behavior. I've had a few parents almost get to a bad place during a match, but a few helpful words from me while their kids had to stop playing, they remembered who they were there for and their kids could go back to having fun. We also have a 75% play policy... At least four times during matches in the younger divisions I ensure substitutions so every player gets a minimum of 75% of the match. If my game cards don't prove that consistently, as a ref I get a serious talking-to. It's considered by all of us as a personal mission and a professional humiliation if we fall short of that; the player is everything.
My heart breaks that folks have had bad experiences... it shouldn't be that way. There's no excuse for it. Club leagues can be more expensive and much more competitive and they don't have the Safe Zone policies AYSO does. But if the club league is well organized it might be a good option, just check them out first. We have two club leagues parallel to our AYSO region, both are good but twice and three times the cost and the level of play is much more intense. There's nothing wrong with that as long as the player is allowed to develop as a happy and whole human being on the way.