not trying to be a fashion guru or anything but if you're going to try to sell clothes in 2017/2018 you are probably gonna want to keep it simplistic/minimalistic. clean font, not too many words/ pictures (unless the shirt is meant to have a lot) and a unique look. Someone posted sweatshirts above with the little graal asian symbol (idk what it means) but those are clean.
Edit: just noticed these designs were actually made by the company itself. I guess they'd be nice if I was in 7th grade and wanted to get bullied by kids for wearing an ugly ass dude on my shirt from an mmorpg not many people know about.