Because Ryan Reynolds didn’t send his co-stars used condoms and dead animals.

Jared Leto is a rapist that probably has a lot to do with it too

More prosaically, Reynolds isn’t the first actor to play Deadpool following an Oscar-winning performance the psychological intensity of which was almost certainly a contributing factor in the star’s death.

And where Reynolds is playing it for comedy, Leto (or at least the marketing around Suicide Squad) very much is trying to be ‘edgy’.

Plus Mark Hamill is still playing the Joker, and being very normal while doing so.

I do feel like it should be said that Ledger wasn’t even working on Batman when he died. It was a different project entirely, and his overdose was likely accidental  owing to multiple doctors in different cities or areas prescribing him different medications that shouldn’t have been taken together, because if you’re rich enough you can wander into a doctor’s office and go “I have X issue, nothing I’m doing is managing it properly, give me something for it”, and they’ll just take your word for it. So Health Ledger’s death probably has only a little bit to do with Dark Knight (or not at all) and a LOT more to do with his well-known issues with anxiety and depression, which he’d admittedly struggled with long before Batman. The people who worked with him on Batman have never said much about him seeming “disturbed” or otherwise bothered by the role out of character, and was even one of the nicer and more upbeat people on set. The only people who have implied that the Joker pushed him toward a mental breakdown were people writing speculative articles, fans who wanted a satisfying reason for his death, and… Jack Nicholson, who was already bitter before Ledger died that he didn’t call Nicholson for advice on how to play the character, because Nicholson owns the Joker, apparently.

So Leto is capitalizing on this “it’ll make you KUH-RAZY” thing that isn’t actually a thing (because, like storywonker said, Hamill’s been doing it forever and a day with a much more manic persona for the character and is fine) and is passively perpetuating a lie about a man who, in life, was an intensely private person. Leto is trying to out-Joker Ledger by being an unprofessional dipshit who harasses his coworkers when his competition isn’t even alive. Assnugget.

Also, Ryan Reynolds understands how humor works. How he plays up Deadpool is entirely comedic. It’s good-natured and laugh-with-me (and laugh-AT-me) rather than inviting an audience to laugh at other people once he’s purposely made them uncomfortable. Leto sent someone a dead rat; Reynolds told some jokes with a few kids dressed as X-Men who were in on it. Leto is trying to ~comment on society~ with his ~edginess~ in one of those “isn’t it hilarious that people have POSITIVE FEELINGS ABOUT ANYTHING ahahaha”; Reynolds shitposts on Twitter. 

People DO make fun of Ryan Reynolds. The difference is that Reynolds is in on YOUR JOKE because he started it, so it’s in good fun even if you genuinely dislike him.

Leto is mistaking unfunny miscondect for quirk and edge. People are making fun of Leto because Leto isn’t in on the joke that is his behavior, so he won’t – and can’t – roll with it and make it genuinely entertaining like Reynolds does.

Ryan Reynolds loved the character and worked over almost a decade to produce Deadpool (a Fox movie, not Marvel) right now Leto is flavor of the month.