Learning something new makes you a beginner again, and beginners notice what experts stopped seeing.

Expertise trades noticing for speed. Once something becomes automatic, you stop seeing it, which is efficient and also means the obvious problems sit in plain sight for years. Being new at something returns that vision to you, briefly and uncomfortably.

Take up something you are visibly bad at, and pay attention to what you find strange in the first week. Those observations have a short shelf life. Write them down before you get competent enough to stop seeing them, because you will not get them back.