Okay need KIND advice. Please no judgement... it’s hard to completely explain the situation.

So i’m need some advice on what to do in this situation. It’s hard to explain all of the relationship “trauma” that has happened over the years between us, but will start by saying I am in my young 20’s and only have one grandparent left which is my grandmother total. Her husband, my grandpa, died almost 10 years ago. I wasn’t super close to my grandparents on my other side of the family, but this grandpa I was super close to. He was THE most precious man. My grandmother, his wife, is completely the opposite of everything he was. To keep it short and sweet she has borderline personality disorder. You never know what side of her you’re going to get. 90% of the time she is mean and hateful. Every time I’m with her she is always commenting on my looks, weight, life choices. Basically giving SO much unsolicited advice. I dread every time I’m with her because I’m still an insecure 20 something year old who feels even more horrible about myself after every visit with her. I’m trying to do the best I can in life! The only reason I feel obligated to see her every once in a while is strictly FOR my sweet grandpa. Should I feel like a bad person for not seeing her as much as I “should”? Am I a bad person? Any constructive advice would be MUCH appreciated. Thank you! ❤️