Hair problems.

hey guys, recently I've been noticing my hair has been getting worser day by day. I used to wash my hair once a week (at least 3 years ago) and it was horrible to me and I couldn't stand it. Last year I started to only wash my hair every second day leading up to the start of this year where I would constantly wash it everyday. I've struggled with extreme OCD the past couple of years and have to have my hair clean 24/7. I've used plenty of shampoos and conditioners but I feel like my hair is only just getting worse. My hair has recently became super dry and has produced a lot of build up. In the past month I've spent almost $100 on hair products to try make my hair healthy again without having to not wash my hair. Last year I found that every time I let my hair down it would knot straight away and wind and humidity would suck the moisture out of it, but as I've seemed to wash my hair everyday it's eased but I feel like it's coming back. Currently I'm using dove daily care shampoo and conditioner for fine hair, I also use an essano hair serum everyday when it's damp. I've tried numerous things to get it back to normal (even trying not to wash it everyday)‭‭ such as - hot oils, deep conditioners, hair masks, expensive shampoos/conditioners etc. I also straighten the hair everyday as it gets really curly and brittle. I used hair protectant spray for two years straight but found it may be breaking my hair even more as it contains a lot of unwanted things I want on my hair. I also dye my hair around every 3 months. I constantly have to brush it nearly every 5 minutes and have found a lot of it is starting to shred quickly. I stay away from products like dry shampoo and hair spray as it makes me feel gross and makes me have the urge to wash it. In February this year my hair was the healthiest it had ever been because I wasn't as stressed as I had ever been before which could maybe be the cause for a lot of these things to happen. Does anybody have any tips?