I also run an ultra wide monitor. The sharp geometry thing happens to me too, mostly inside houses where there is like a small lip between rooms, or on stairs. Otherwise the camera seems fine. Maybe playing with the sensitivities or fov might help. Fov also seems to be calculated in a weird way, I have it set to 90 but it feels a lot wider.
Maybe it’s just low fps? I’m only getting around 70 fps with a 3080 (3440x1440) at mostly default graphics settings (but it feels smooth enough for me) .