With in-game Sensitivity for mouse and keyboard set to 0 and a moderately high mouse DPI of 3500, the camera rotation is still way too fast. The rotation speed is unaffected by Windows' "pointer speed" setting. Tested in full-screen mode, 2560x1080 screen resolution. In windowed mode, the rotation is even faster, as noted in MCPE-22136. PC games usually allow for a much lower sensitivity setting, compared to Minecraft. Even Minecraft Java Edition is fine in this regard, although its sensitivity is dependent on the Windows' "pointer speed" setting.