Hair is a whole topic believe me. The hair dryer doesn't really do that much damage, it depends on the heat and frequency of use too, and if you use a brush or not, even the type of brush, yes it is quite a topic to talk about but when it is done right, nothing bad happens.

On the other hand, the vinegar thing you probably weren't doing it right, that's what I think, if you allow me I will explain a few things below. I will start by saying that when I was little my mom would put vinegar in my hair but the way she did it was to use it after shampoo, she would use it as a conditioner and then wash it out with water, this always left my hair smelling like vinegar and in fact I hated it and stopped doing it... Until the year came when I did more research among them I found the way to use vinegar. First you have to dilute it, applying vinegar directly would damage the hair because the concentration is very strong, so you dilute it in equal parts. If you're going to use a cup of vinegar then dilute it with a cup of water (1:1). The next thing is that 1 hour before I shower is when I take the opportunity to use this, personally I already have it in a spray bottle so 1 or 2 hours before going to shower I apply the vinegar and massage my head, after that time I wash my hair, I always wash it 3 times with shampoo applying only to the scalp, then I use conditioner, cream bath, when I get out I place a towel without rubbing or squeezing, I apply heat protector, I use the dryer a little and at the end I apply a tip sealer oil. But this fact of applying the vinegar before washing my hair helped me so that the smell was gone.