Personally I am working with a wonderful counselor, She is helping me with stress anger etc. she has suggested books for reading like ‘When I say no I feel guilty’ ‘abusive relationships’ and ‘toxic people’.
She also told me to get a whiffle bat and hit the trash cans or the trees near by. Just let all that anger and hostility go out.
Believe me I didn’t think it would work, but I didn’t do it before then and I ended up in the hospital several days with stress burnout until these things were suggested. Try it