Does hair bleach destroy the hair and/or receding hairline?

So, in 2024 I dyed my hair twice (April and September). Since then my haid did become worse, but it's been getting better when I used conditioner daily (I didn't do that). My dad has been telling me that it made my hairline recced (even though I don't even remember my hair before that) and my mom has been telling me that it will destroy my hair

If it helps, here are additional information:

I'm a 14 year old male. I know I shouldn't use it till 16, but I really don't mind the damage it's done since it's highly repairable