Here it's video the guy is talking about: https://www.instagram.com/p/DW999J8E1a3/
It's really just a case of it being too much and trying too hard to be edgy. Like, when it's a normal T-Shirt, I feel like it fits him way better, while also keeping the Punk motif without going over the top.
Also, I know in some stories he is meant to be an Edgelord Tryhard (like Superman vs. The Elite), so in a weird way it may work, but I always felt it was too on-the-nose to work in practice.
For me it's the Suicide Squad, because when DC remembers that the team is meant to be composed of unknowns and not be a mostly consolidated line up like it is in most recent main stream adaptation are, it's an incredible concept that can tell great greyish stories.
He has a great design, cool abilities, and some really interesting plot points (like being the original Spirit of God's Wrath, for example) that can make him a really compelling big bad in Justice League Movie or a Justice League Dark one, for example.
Another thing that can help is that Eclipso doesn't have (to my knowledge) a definitive story that is the status quo of the character nor that he isn't that well known outside of comic book circles, so they change the character to better fit the movie he is in, without the fear of receiving backlash for not being totally faithful to the source material.