OP, If you don't want to hear your friends opinions on your domestic arrangements, why are you telling them what goes on in your house?
Of course your friends are going to make well meaning suggestions as to how you can motivate your partner to help out more. They see you are being treat with a lack of respect and don't like it I'd imagine.
I have a friend like this, and find it very difficult to listen to her. She will even smile and laugh as she catalogues everything her 'D'P refuses to do, yet if anyone suggests ways of improving the contribution her 'D'P makes in the house, they are met with a confused look and how XYZ couldn't possibly work on her 'D'P, and most of the time, there is absolutely no need for her to even mention him, if she doesn't want other people to know what is going on in her house.
For example, another friend of ours has just returned to work after ML, and friends DH is picking up the DC from CM twice a week. The put upon friend then just HAS TO say "My 'D'P would never pick up the DC from nursery, I have always had to be responsible", all said with a
on her face.
Why, just why would you mention it?
If you don't tell your friends, then how do they know OP?