Fanboy is a strong word, i'm not a fanboy, i just know what happened a year ago because i don't have a shit goldfish memory.
S1mple joined Na'Vi and made that team win a big tournament.
Until then Na'Vi were the guys that got far in tournaments but never won shit, thanks to S1mple they did.
Next tournament the coach ruling happens and the IGL and Coach of Na'Vi (Starix) was no longer able to IGL, resulting in the team desperately looking for a new IGL.
Seized starts to lead but because of this his level is severely impacted and he starts to become (as people said) a decoy.
They bring back Zeus in the team after GuardiaN leaving to join FaZe.
The team improves yet Seized can't come back to that high level he used to be at and Flamie can't frag as he's expected to.
They kick Seized and they bring Electronic, since they won a tier 2 tournament and S1mple with Zeus markeloff, etc, won WESG that is another tier 2 tournament (The finals were kinda tier 3, GODSENT was meh)
Since S1mple joined the team he has always been a consistent good fragger. As an awper he has been the carry of the team, and since the join of Electronic this team seems to be even better than before.
The point people bring up is that he destroys the team, he may, he did have a negative impact on GuardiaN's career and he did say some shit about Seized in the past, yet he has always been an insane player, and Na'Vi going to tier 2/3 doesn't have anything to do with S1mple being a bad player.
It may have something to do with his attitude (that we don't know for sure) and it does have a fuckton to do with valve ruling on coach and IGL.
If FaZe does -GuardiaN +S1mple then the only issue i would see is that S1mple's mentality would have a negative impact as he would want to be the star but players like Olofmeister and NiKo would most likely be the stars.