It's time to face the reality Chris. If you don't have the skills to be fairly quick right now, chances are you won't get much better from here.
And, as
@BWX said, a wheel would help with that a lot. I know because I for the life of me cannot get fast using a controller, while people like
@NAXEHT use one and still produce top times regardless, it's mental. It's all about that preference.
But...should you get a wheel, you should
not expect a sudden decrease in laptimes. Getting used to the wheel is a learning curve, and you will likely be much slower than you are right now with the controller.
If you do happen to get quick in your mid 40s, good for you, but until then, it's speculation.