I appreciate the sincerity in your words vis-a vis davening.
One point to consider:
The way one relates to others, Hashem relates to that individual.
So if one is less critical & judgmental, Hashem responds in kind.
I’ll just address 2 of your points:
#1- There are unfortunately people who have ADD or PTSD who cannot sit still. Speak to people who work with these kids or adults. Appreciate that you are not one of them.
#4- Some people look around to gain inspiration by those who are still davening intently because they would like to achieve that state, too.
In the merit of being dan l’chaf zchus, may Hashem answer all your tfilos l’tova bimhera.