I've never bleached my hair, but I have had some heat damage before. What corrected that for me was trimming the damaged part, deep conditioning, and no longer using a flat iron (Although there are curlies out there who periodically use them with a heat protector product and keep the iron on a lower setting). Over time my hair has returned to a healthy state.

It might help to enter a search on bleach damaged hair or to re-title your post asking for help with that specifically so people with more experience with that problem will pipe in.
3b / Fine / Low (to Med) Density / Normal Porosity & Elasticity

Currently Using [*Holy Grails*]
Cleansers: DC No-Poo / DC Low-Poo / *BaSo & ACV*
Co-Washes/ROs: CJ Beauticurls Argan & OO / DC OneC / Organicals DC Creme
Additives: *Silk Amino Acids* / Honeyquat / Fragrance Oils
LIs (found some!): KCKT / CJ Beauticurls LI / CJ Curl Assurance Smoothing Daily Condish
DTs: *Coconut Oil* rinses / *Honey*, EVOO, & DC OneC / CJ Curl Rehab
Sealer: *DM Super Buttercreme*

Goal: APL Hair