I don't disagree with anything you're saying. Our experience for our kids sounds similar to yours. But I also get that teachers want to teach, don't want to get sick, distance learning isn't great and that they're left to balance those opposites.Only in theory.
I have three elementary school age children. All the Karens whined that their children got too much screen time and it was too hard to work with their own children. One of their teachers did a good job with this despite the whines. For the other two, work was cut down to about 2 hours a day. School is normally 6 hours long (taking out lunch).
My wife had to find home schooling materials to ensure they actually learned and finished their grade level math and science work and fill in the other 4 hours. The teachers couldn't be bothered to do more than post some materials on Sunday evening and make some 'hi how are you' videos every so often. Not even optional materials. And you can forget any effective education in art and music. The teachers were very obviously putting less than part time effort into education.
Other parents went the opposite way and didn't even make their kids do anything. Among the three grades there were about 1/4-1/3 of the children who finished all their assigned work. There's no accountability for that.
This is a district with normally a 7-8 elementary school score.
If they were in HS taking more advanced technical classes, we'd be screwed. If online education worked at a grade school level, the system would have shifted on its own before COVID.
My understanding is that a lot union contracts specifically prohibited distance ed prior to COVID.