I cannot understand this attitude. I've already explained the reasons why teachers may be unable to deliver what you demand but you seem not to have listened
I’m sorry Lemon, I disagree with this somewhat, as you’re generalising also, it may be the reasons you’ve mentioned, however it may not, as you cannot speak for all schools.
Some schools are giving excellent homeschools provisions and others are not, an OP posted a thread that her child was only receiving 20 mins work on line for the school for the whole week, no other work was being sent or set up, she was shot down as “teacher bashing) even tho she has spoken to the head teacher who advised this was acceptable 
Parents are going to look at the teachers if their children’s educational needs aren’t being met, as it’s the teacher who should be supplying the homeschool class work. (or a teacher within the setting) and yes it may be the management politics that stopping children from getting adequate education, or that the teacher is sick etc... however the politics/management or what ever reason within the schools has absolutely nothing to do with the parents whose frustrated their children aren’t even getting a basic education, might seem unpopular but sadly true.
And I’m not teacher bashing, speaking to teacher friends (Scotland and England) the past few months and speaking to a few teachers this morning during a CORE meetings, they advised their schools teacher are working on a rota, (taking turns to educate key workers children’s)
I can give you an example of a meeting today, vulnerable home, a teacher is delivering pack lunches to the homes everyday, this child does not have the internet at home, so therefore other than the original workbooks sent on the 23rd March they have had no other provisions, parents frustrated with this. Teacher said it was their fault the child has no access to the internet 
It took me to say if your delivering packed lunches everyday why can’t school work be delivered at the same time? Apparently they advised they will look into it.
It’s took me a 10 min call with the headteacher and this child will now be receiving work with weekly phone calls to discussing any issues the child may have, the work will also be marked and feedback given.
However so many children will be in similar positions as I’ve just said above sadly.