How to fix dry tangled hair

Bo

So like a year and half ago I bleached my hair twice in one day I ruined it it was so long so I kept cutting inches off. I dyed it black a month after bleaching and Itsbeen a year and a half , every month I fix my roots and refresh myblack Hair. I wash my hair once to twice a week, once my hair is washed it’s so shiny and soft after it dries but next day my hair is all tangled , dry bad. I don’t understand that damaged crap had gotten cut off and stuff through the time... i don’t understand what else to do ideas please. I don’t ever do anything to my hair maybe 1 a month I’ll straighten or curl my hair is thin so I do it on the low setting. I’m just not sure what else to do...I’m not shaving my head so don’t suggest it and I’m not gonna cut my hair because I already do and it makes no difference. I don’t have broken ends and it’s not fried looking half way down my hair is just so coarse. I use the Biolage Fiberstrong conditioner or the Biolage Repair All Mask everytime I wash my hair, scrunch dry my hair a little then use the Miracle it’s a 10 keratin leave in and some hair oil after and comb. My hair is awesome then but after it’s horrible