The rugrats equalization just boosts the frequencies above 4kHz , which were low IMO.
If you want to reduce the volume-variation try the LevelSpeech2.NY plugin on default-settings …
There is no post-production fix for turning your head away from the mic : that changes the volume & frequency content. The AT2020 has a front & a back. In future make sure the front is facing you square-on.
otherwise moving your head slightly could cause big changes in the volume.
BTW if you’re using noise-reduction, use the least amount, as it does damage the speech.