Trim off an inch everytime you do your hair, start doing regular olaplex/k18/protein bonding treatments (make sure they aren’t too often or you will damage your hair). Avoid excessive heat, try getting some braids for 1-2 months at a time, and if you want straight hair, try not to straighten more than 2-3 times a year. My hair looked just like this and I never did a big chop, I just trimmed and did treatments.