Well a lot of the humour is really transphobic or sexist and I definitely remember at least one racist joke. There is definitely a lot of good jokes and it's a funny show, but then something like that comes out of left field and it just kills the mood for me.
There are instances of some gay panic moments, especially in the earliest seasons when that was the norm for early 2000s western culture, but to suggest "a lot" of the humour is of this nature is just plain false.
The problem is when you take something out of its time and see every portrayed character as stereotype - you will kill all humor in the end. Imaginge some todays series in 10 years. There will always be some further developed people who adapted their own human being to whats morally acceptable in given time.
Ask people who are "affected" by the humor and if they are offended. Or make jokes about growing grass.
I watched it for the first time recently and it was good but... Nowhere near as amazing as the internet led me to believe it would be. JD and Elliot's relationship in particular was infuriating and I hated any episodes that were about it. They turned each other into horrible people.
I never fully understood the appeal, but i have some good memories watching it with a group. I rewatched some the other day and it was really gucking bad. I guess if you find bad slapstick funny or seeing people run in these fast forward sequences, then it's pretty good.