I had spent years trying to work out why everyone was so especially unkind to me. I thought maybe I was autistic (I'm not), or that I was giving off weird social cues. Turns out that I just have trouble regulating the regular ups and downs of normal emotional life.
Often people talk about task-completion and procrastination when ADHD comes up. That's emotional disregulation too. You sit at a desk, open your algebra book and start working on problem one. As soon as it is slightly difficult the uncontrollable emotions run wild. It feels awful. Now scrolling a couple of youtube videos takes your mind of it. You get a little break from (what feels like) world ending emotional pain.
I still struggle with this years after my diagnosis but the first step to improvement is to label the emotions you are having, when you have them.