You've never experienced inconsiderate coworkers? Like coworkers who talk loudly on the phone in a nearby work area, coworkers with hygiene issues, coworkers who don't carry their weight or respond well to training?
I did, but these kind of problems were (at least for me) manageable (discussing the issues, "avoiding" these people, etc).
It's entirely possible to have had none of these issues when you only worked for a few years or in a few companies.
All of these issues should be addressed by the manager.
Or potentially addressed directly. I've had a couple occasions where I literally told a sexual harassing manager to "go fuck himself" twice. (He was harassing the women at the office) At another company I was politely confronted about a comment I had made, we talked it out. It was unintentionally insulting and we acted as adults and I realized why he brought it up.
Well, there's a big gulf between "toxic" or "impossible to stand" and mere "inconsiderate".