If you don’t know what that means, we cannot help you over the internet. I don’t say that to be mean or harsh, so please don’t take offense.
Can you find a good trainer to take lessons with?
While a horse needs to be soft to the bit and break at the poll, it is also very important that the horse’s body is traveling correctly. There are folks out there that can get “false collection” by only setting the horse’s head in a certain place, but allowing the horse’s body to travel hollowed out and strung out.
If you haven’t made any progress in almost 2 years, it’s time to seek help for yourself and there is no shame in that. One never stops learning. I like to go ride with a reining trainer in my area at least a few times a year – keeps me and my horses on our toes.