[maxioatic]

"programming for a while" and "been at it much too long" are pretty nebulous time frames. However, in general, I personally feel that time is not a great indicator of whether or not someone should be good at something.

My opinion is that you need to take a serious look in the mirror and ask yourself why you're not where you want to be at and if you want to get better. If you do, start with something small. You say you have no CS knowledge, so start there. Take an online course or find a syllabus from a CS course and buy the textbook. Don't worry about how long it takes you to grok it. Just work on it consistently and keep looking in the mirror and being honest with yourself.

If you end up not wanting to put the work in that's fine as well, move on to something that interests you (CS related or not). Good luck!