Kooza, totally agree with you, that is also my experience of flying. If you are organised, take stuff for the dc, have an expectation of behaviour and engage with them- no you won't be able to read, watch a film or pretend to be single. You have to be on parent duty for hours.
I always get people helping ( with a bag or holding a dc hand when expected to descend a plane down virtually upright steps with dc and bag in the the dark) and sometimes I am very lucky and get a travelling gp who takes a fancy to the dc and asks to read with them.
And I travel longhaul for family reasons. And even if I didn't, I would still think about travelling long haul with my dc if I wanted to. The idea that someone may be on the flight who expects it to be child free or kids to travel in silence is ridiculous.
And putting your seat back as far as you can as soon as the seat belt sign is off is annoying for anyone ESP in the tiny seat sizes of economy. But that's another thread:)
I really haven't come across anyone who pulled a face at baby changing or bf on board. Why should they? It's normal. What's not normal is seat kicking or parents ignoring a couple of toddlers messing about and being disruptive. I would mention it to the cabin crew myself.
I also don't agree with bundling all families together. Segregation of dc? What next, old people not allowed to disembark til last as they are too slow?
I have a friend who travels business with her dc and their is an on flight nanny for hers provided by the airline as part of biz class service.
Children are the customers of the future. So it makes sense to be nice with them.