This is mostly speaking to those people that were fans of the character before he started making film appearances.
In the 90's, it seemed like there was more of an attempt to spotlight Deadpool as a victim of extreme mental illness. Wade still had his witticisms and irreverent humor, but this was more of a way for him to hide his constant pain. Nowadays, it seems like the mental illness angle is completely gone. Ever since the early 2010's, writers have taken the approach of making him be a walking meme. He has a schtick of being very campy and making jokes that other heroes aren't allowed to make.
I'm not saying the way he's written now is bad, but I would like to hear how others feel about his more flaunderized, contemporary portrayal.