Is this about Richard Kuklinski, the mafia hitman guy? I read a book about him. Absolute nutcase.The Iceman, seen it many times, outstanding. True story. Just watch it.
TLDR YES it isn't as acurate to the reality of the real guy, so what, yes he was a scumbag and a real twisted piece of work, if you've listened to the interviews blah blah blah, this isn't as acurate/real, but to watch it purely as a film, this is very good. That's enough for me, sorry not sorry.