There are currently 771(low amount, it is early) players seated playing approximately 80 (low estimate) hands per hour assuming those numbers stay steady, that is 6,160 hands played in one hour, and 147,840 hands played in 24 hours. By your math that is 35.5+ four of a kinds per day.
Your sample size is too small. The direct observations of a single player, even playing 24/7, is too small.
Btw, napkin_holders link is to another post in this forum, perfectly safe:
It would really help your case if you could post the hand numbers showing hands that you played in that have four of a kind (yours or another players) I know you probably do not have any hand numbers from your past (in the last two months you personally have had 6) But in the future you could save the hand numbers of four of a kinds you were involved in showing at least one for each day you play and post them here.
Cheers!