I was watching his stream vs OG and he seems incredibly against Notail for some reason, like he's throwing shade everytime. One interaction between Sumail and Gorgc goes like this :
Gorgc : Who's the best captain you've ever played with?
Sumail : I think Johann (Notail), he's like so postive and good vibes you know?
Gorgc : I mean you would be after you've won 2 Ti's (says it seriously, not jokingly,)
Sumail : ……
Notail was positive way before he won those TI's, everyone knows that.
Another Interaction : We see Notail come on camera in the booth wearing a headset as acting coach
Gorgc : Wait..Notail is here??
Sumail : Yeah ofcourse he's the standin coach
Gorgc : Yeah but you know he didnt have any hand in OG's strats Etc, he's there purely for show
Sumail : …No..he's the coach (or sth like that)
Gorgc : Another salty reply I dont remember
Everytime Notail came on screen or was mentioned he always had something to say
Source: https://www.reddit.com/r/DotA2/comments/ur53sw/why_is_gorgc_so_salty_whenever_notail_is/