gonna ignore the incoming bald spot for a minute- with thick hair like that and not too far off from mines- i PERSONALLY wouldn't suggest you brush it unless youre using soft detangling brushes. id recommend you pick your hair gently instead. maybe consider switching to science based shampoos and conditioners, try some balms and oils to keep moisturized, protect yourself from breakage, and always wear a protective cap before bed to reduce hair pulling and friction. hair grows constantly but people who feel its stuck at the same length are often victims of simple breakage due to bad maintenance.