At first I didn't like it but Leto is solid and should do it justice. The real issue I have is the "damaged" tattoo since it looks like something Miley Cyrus would get
The character design has nothing to do with the actor's ability to portray the character.
That's not necessarily true. I recall the outrage of Heath Ledger being cast as the Joker. His performance clearly transcended the doubts. I'm not saying this is exactly the same but we can draw a comparison. Point is, if someone is an excellent actor I reserve judgement until I see it in action. But that still doesn't mean I like all of the elements of the design either.
People were upset about Heath Ledger being cast as the Joker because they were either unfamiliar with his acting ability, outright believed he didn't possess said acting ability, or thought that he didn't look the part. None of that had anything to do with the character design, or the costume/makeup. It had to do with Ledger the person.
"Outrage" over the depiction of the Joker character shown above for the Suicide Squad movie has nothing to do with Leto being the actor. The people defending the character design keep bringing up Leto for some reason, but that has nothing to do with the discussion. The masses are upset with the design of the Joker - the costume, the makeup - not the actor playing him.
You can't draw a comparison. The situations are completely reversed.
This is something the studios still don't understand. Comic book characters become well known and iconic not just because of what they do in the comics, but how they appear. If you don't have a successful character design, you don't have a character. Take too many liberties with that design, whether its a costume change or a change in the race/sex of a character and you risk losing something in that translation. There is a difference between having a different take on a character and bastardizing the character to the point it no longer aligns with the source material.
Those in charge of coming up with the Joker for the movie had 75 years of source material from which to work. The mixed reactions on the internet are a good indication that they didn't succeed. This is one of those instances where they didn't need to blow people away, they just needed to not screw it up. And it would appear that they have failed.
Those tattoos are distracting and they don't fit with the character. Tattoos aren't a defining characteristic of the Joker to begin with, so you don't need them. If you want them for whatever reason, okay, but you are going to make every single one of them follow the joker/jester/playing card theme? Really?
Like I said, this is not the same situation, but they're not reversed either. I completely get what you're say though and I agree that this isn't the look I would prefer for the Joker. The comparison is that people aren't happy about this depiction just like they weren't happy about Ledger. The sell was in his performance and that could (or could not) be the case with Leto.
See the recent Fantastic 4 design/casting backlash. Now that the trailer is out, a lot of folks have changed their tune. So again, I'll wait until I see his performance to decide whether or not I completely hate it