I think I will be safe by saying that everyone has hit a wall, physically or mentally. I’ve hit many walls in my life (physically, and it hurts), but recently I got into one that has me on a limbo. I realized not very long ago that I hit a wall in sim racing where I can’t figure out what I am doing and seems that I can’t advance in terms of my driving and setting abilities. On top of that my internet was playing games with me, which ultimately made me take some sort of a two month break from competitive racing altogether. I hope that the next season in iRacing can bring me that burst of energy, knowledge and speed that I am looking for.
I remember hitting this wall two years ago, but was able to go past it relatively quickly, but that was because I was unemployed at the time. Maybe just concentrating on one series alone and one car could help me understand. If I can also get help from fellow racers it will be awesome as it helps to see other points of view.
With that said, anyone willing to help?
Alvin's Sim Racing World 
Hi Alvin!
Although I can’t relate to SIM racing or other driving sports, I’m a “Wall-expert”. Very recently, I hit my greatest wall ever. I’m still in the aftermath of such Wall. But although it’s a very different type of wall from the one you encountered, the guidelines of overcoming walls are universal.
First, examine the wall. Determine the existence of such wall. Know your wall; every aspect & detail is important. Once understood why the wall is there, explore your weaknesses. Comprehend every flaw you have and where do they come from? Are they in your genes? Did certain circumstances influence these weaknesses? Have you done something in the past to overcome them?
The next step is to trace a plan. Similar to any other plan, it will require actions. And sometimes resources. Determine what you need to overcome your weaknesses. Scribble it down in writing or electronically and have it visible & accessible. This plan will help you step by step to take actions with the goal of eliminating or reducing your faults. If weaknesses can’t be undone, reducing them is acceptable. But remember the Wall is still there and only working with your plan will help you climb it or smash your way through it.
The process doesn’t end there. Once the wall crumbles, have in mind that a new Wall may appear. Therefore, always draw a plan. If you are able to work towards improving yourself, then no Wall or barrier might me strong-long-thick enough to hold you down.
Wish you the best of luck!