You are in good company... well, at least you're in company, lol. I feel the same way a LOT of the time. Life is hard sometime. I don't have a tic but I am beginning to develop arthritis in my fretting hand knuckles, I am disabled due to spine problems but what'cha going to do? All you
can do it to accept the good with the bad and know that there is always someone better off than you and always someone worse of but... and I KNOW this very well... knowing about other people really isn't much help because you live in
YOUR world and
your problems and
your problems. I think maybe you are having a bad day. I have them. Sometimes I have a bad week, sometimes it seems like a bad month. Things pile up on me and it seems like I am never going to catch up, like I am just getting older and not better, like the Pink Floyd song say's, "... you missed the starting gun" and "the sun is the same in a relative way but you're older". I know what you mean... but it DOES matter, you matter. You matter to you. I don't know you other than this post, but as a fellow man... you matter to me. I hope you can find a way to just relax and have fun doing what you can do.
I used to sight read music for vocals but it has been so long since I did that I am not sure if I could do it anymore. I've NEVER understood tabs and believe me I have tried... they make no sense to me at all. I have a different learning style from most people and teaching is pretty much always geared for the learning style of the majority. It has always left me behind.
If there had been ADHD when I was a kid I would have been the poster boy, I still have all the symptoms but I am afraid to get treatment because I have heart issues too and the treatment for adult ADHD is Desoxyn (pharmaceutical methamphetamine). I bet I could stay focused if I had some but the risk... well. I think pot will keep you focused but what you focus on may not mean anything to you later.. lol.
I have a really hard time learning anything unless I can see someone do it. I seem to forget faster than I learn.
I learned a lot of guitar by watching other players.
I too play by ear and for what its worth James Burton plays completely by ear and you hear his playing on more records than you can imagine.
I play for my own pleasure these days. I may or may not learn a lick but hardly ever a song... why bother, it isn't like I am going to go out and play it. I recycle songs from the early 70s that I learned back then. I play along with tunes and I am happy doing it... until my knuckles hurt too much, btw.. Voltarin gel helps, if you get that problem too.
So... what about you? Find your joy in just doing what you do because you want to. If you want a new piece of gear and you can afford it, get it... if you use it once... so what. Life is short, try to not worry about others because, trust me.. most of them are not thinking about you. Enjoy your life, live it the best you can and live TODAY. Yesterday is gone and tomorrow may not come.
Love yourself. Try to not become too isolated from others. I tend to do that. I think I could easily become a hermit and the less interaction I have with real people, as opposed to online people, the less I want BUT.. when I get out and interact with others, it changes my whole outlook. It helps me to be happy and to get out of a funk. Left to myself I would spend my life looking out the window becoming more and more introverted and more and more self centered and unhappy... so I have to make myself get up and get out. You may not have these things to deal with, I don't know... I just know what helps me to get better. I would mention Someone else Who helps me but it would violate the TOS... so I wont.
Bottom line, it sounds to me like you are in a rut. Get out, make some changes. Live and love and do the best you can. Enjoy those things that don't seem to matter... they DO matter. They matter to you.
Be well.
Julien