Your post is very one-sided, sieg.
Both dcs seemed to spend one lesson a week plus watching a DVD of slight or no relevance to academicals. Television can be an excellent way for some children to learn, particularly for visual learners; every child is different and that's why not every lesson is learning through play/reading a book/listening to a teacher. What did the school say when your said you didn't think the DVDs were relevant to their education?
Timewasting - constant redrawing of institutional boundaries, rule-reading, surely the rules have to be repeated for a young child to understand them? Authority is a part of life, and a formal learning enviroment teachers young children that. circle time and the like, how is talking about children's problems time-wasting.
Some children may not have anyone else to tell their problems to. badly run lessons especially in RS, and also disorganisation, waiting around, these are all your own personal opinions, but I assume you were helping in class or something to witness them - so what did the staff do about it? cake sales, folkdancing, school orchestra when no-one turned up. Extra-curricular activities. Again, I have no idea how this is time-wasting. Are you not of the opinion that we're all constantly learning - even if, as you say, no-one turned up?
Rudeness - boredom leads kids of talk not very sotto voce while head drones on about the school cormorant. Not listening becomes a habit. Like it or not, boredom is a part of life - school teaches children to cope with it, because unfortunately we can't always do what we like. Not sure how that links to rudeness though - surely that's just a personal trait - some people are rude, some aren't.
NB My children both went to real school while at Nativity Play age, and ds is at an FE college now. And I think 22k a year for plays and assemblies may not represent v. good value for money. Do you really think all they got out of their school days is plays and assemblies? See above! 