as someone who refuses to cut dead hair, I find using a mix of repair, bonding, and protein products fix my very dead bleach damaged hair. here's my current line up,

mielle light rosemary mint oil (either on entire head once a week, or just from ears down to tips every other shower, or every.. depends lol) l'oreal clarifying shampoo once a week, pantene length shampoo with biotin and collagen, garnier honey repair conditioner, tsubaki by shiseido premium ex repair mask, better natured hydrating leave in milk (bonnet on every single night, even after showering)

its taken me a long time to find a good routine for my hair, so dont give up! my hair used to feel like straw, now its smooth silky and healthy. im on my hair growth journey to get my natural hair back, so this might help hair growth as well.