>20 years ago, people claimed that IDEs were bad, but now the situation have changed. PyCharm has almost everything that Sublime has
Whether "PyCharm has almost everything that Sublime has" is not really relevant to whether people claimed IDEs were bad -- seeing that people didn't claim IDEs were bad for lack of features.
It's the slugginess and especially the "take it or leave it" bundle of stuff that comes built-in into an IDE that annoy(ed)s people.