he wasn't "hiding it behind a smile". he was open about his depression and spoke about it publicly several times. you don't need to analyse his lyrics and tweets etc. to fit some poetic, romanticized narrative you're trying to create.
The impact of their first win:
•Trended on naver and melon
•dramarama jumped 200+ places to first place on melon
•Trend 1st place worldwide with #MonstaX1stWin on twitter
•Debuted in top 50 billboard social chart at number 18
jun: hey mingyu, why did the dog crossed the road?
mingyu: i don't know
jun: to get to your house
mingyu: ....
jun: knock knock
mingyu: who's there?
jun: the dog
“dramarama is so disappointing”
“monsta x should go back to their old sound”
“monbebe is such a stupid fandom name”
“there’s a reason why they haven’t gotten their first win yet”
me: