I agree. My worst fear is that he's taking new students (ik it's unlikely) but, if he did he would be more brutal. Or worst case scenario Heejae could also be petty and used his connections so Garam's opportunity is reduce internationally. This is just a wild theory btw based on the first vignettes that made it seem like Garam did continue music after leaving the states and had a few concert in korean.... But, yeah mine's just a theory.
Heejae lack of understanding that he should have apologized and his vengeful method agains Jeffrey (conducted - y'know the way Jeffrey lost so many opportunities bc He ejae influence the board and how he's forced to go on hiatus...) make me fear the worst.

Heejae is such a leech he stripped him of everything, his youth, his soul and passion for music. Garam is probably around his 30s which means he spent half a decade at the hand of Heejae and being molded by him and another half suffering the consequences. And to make matters worse we know how Heejae is so just like with his old manager garam might be haunting him but overall he’s living his best life. I hope ppl would leave him but that’s unlikely