The baby is nearly a year old, is thriving and should be fairly settled by now. The baby is your DD's child, not yours, so assuming your daughter is, at least 20 then she is old enoug, fit enough and quite capable of looking after the baby herself. I mean that is what a parent is meant to do.
To save aggro in what is obviously a fairly snippy relationship, I would slowly but surely disengage. If you you are visiting everyday to help, find reasons for missing the occasional day, for arriving later, leaving earlier, then book a weekend away. Have a good long holiday this summer. Gradually let her bring her child up the way she wants to with just occasional help from you when she requests it. If you do do any childcare, ask for written instructions and a care plan.
Presumably before the baby was born, even conceived, you managed to occupy your days with other activities from housework and gardening to friends and hobbies. Resume that life (of course, if for the last 10 years, you have sat round the house all day waiting for grandchildren then there is a problem, but very unlikely). Anyway, return to the pre-baby way of life with some time set aside to visit and enjoy your grandchild. Let the mother do the caring.
Being quizzed by chemist's assistant in Boots.
Son’s girlfriend diagnosed with BPD