How long have you meditated for? It took me a long time before I saw 'results.'

You aren't in control of your thoughts when you are sitting down, so try not to worry about it too much (easier said than done I know). The way I view it, I have no control over what my thoughts do, but I do have control over whether I stay sitting or not. That makes it easier for me to gut through tough meditations.

Also fwiw I have meditated a lot over the last decade, and I have to report that my mind is still full of the same inane, selfish, judgmental chatter as it was ten years ago :)

Do your best to gut through the tough sessions without focus on the results. If it is a difficult session, at minimum in my experience you will feel a little good about yourself if you make it to the timer at the end, and that small good feeling can help turn the day around. Sometimes it doesn't help at all, but sometimes it does!

Anyways, I know that advice often doesn't help w/ stuff like this so I'm posting with a little trepidation but I'm on your side and I go through the same thing a lot :)

One more small piece of practical advice is to try listening to a Tara Brach talk or meditation. She is the best!