What is the best treatment for damaged hair??

Let me know if you're just experienced or if ur a hair stylist I really need to know. Ok so, my hair is kinda falling out. i've used tres semme(anti breakage) Garnier(intense repair or something like that) and right now I'm currently using herbal essences (curly hair something like that its purple.) my hair is just falling out. especially in the shower. i straighten my hair like twice a month and i put hairspray in my hair like 3 times a week. I cut my hair like in april into a bob. a little after that i went and died it lighter i hated it and i died it my self with that simply 10 (dye dark brown) and a couple days ago i died it dark brown again (garnier) i use conditioner everyday. idk wats going on because like 2 years ago i'd straighten my hair like..... every other day. well i died my hair dark brown so that i could let my hair grow out so that i could let my natural hair color grow out. ive been stressing but. i think ive stressed alot more than i have right now. Best answer gets the points!! but help me.