It's not about the pixel count, it's about the focal length. If you want to capture pictures that look true to life, best representing how your face actually looks, you need to use a 50mm lens. Here are some examples of the same portraits being taken with different lenses:

https://www.dpreview.com/forums/threads/facial-distortion-of-various-focal-lengths-for-headshots.4164807/

Your fault for thinking the issue was not enough resolution