I think this feeling is shared by 80-90% of people at minimum.
Personally, I've never found a way to do something meaningful (like, materially help people) that would also keep me and my disabled family members out of debilitating poverty. So I have no choice but to dedicate my working days to unethical profit-making shit.
That might be true if the shirts were made to order in union shops with vaguely fair profit sharing. There's nothing I can see to indicate that's the case here, though, just bourgeois decadence.