+1 Ax1Le/Hobbit/sh1ro have made playoffs in 8/8 relevant tournaments (7 finals, 4 wins) with 58 maps, compared to ZywOo's 3/7 with 13 maps. This will negatively affect his Big Event playoff rating stat which is one of the most important factors used in rating players. ZywOo has only 3 EVPs so far, while Ax1Le (2 MVP, 4 EVP), Hobbit (2 MVP, 4 EVP), sh1ro (1 MVP, 6 EVPs).
Gambit players have unarguably played against tougher opposition far more than ZywOo, which makes posting higher stats tougher. Yes, I'm sure ZywOo is capable of maintaining the same numbers if he played similar amount of maps as Gambit players against the tougher opposition but we can't rate players based on "ifs".