It may sound strange, brother, but I feel that EA has fixed the error of the 'ADS sensitivity' slider, where the option value of the 4:3 screen ratio interferes. Although it was impossible to measure without an error rate because the Apex Legend's aiming magnification was extended to decimal places, I would like to say that the 'ADS sensitivity' slider seems to be applied as a normal percentage to my Apex Legend setting after obtaining and reviewing the fixed settings of three games (Rainbow Six Siege, Call of duty Modern Warfare2, Apex Legend). I think this may be the case where the error is not applied in the settings I use, or EA finally identified the problem and patched it successfully.
My viewing angle is 1.23759958, and the general sensitivity is 1.4024444212633363493480942452151793986589141845703126, and the aiming sensitivity is set to (mouse_zoomed_sensitivity_scal_0"0.6413056", mouse_zoomed_sensitivity_scal_"0.64". The game was converted as much as possible from Rainbow Six Siege (Default FOV=70.5328, MouseYawSensitivity=100, MousePitchSensitivity=100, MouseSensitivityMultiplierUnit=0.001077).
Please review this and correct the Apex Legend's aiming sensitivity.