Here are a few things:
difference in opinions - 20 years ago you could have a rational conversation with differing opinions and everyone would agree to disagree. Nowadays, you can get cancelled and doxxed for having an opinion that differs from the majority.
The Attention seeking - before the rise of social media, people would act like civilized individuals but nowadays, most people are acting like nutcases just to go viral on social media.
shittalking - 20 years ago you could say some of the most vile things to other people and most people just shrugged it off and went about their day. Nowadays, there are so many snowflakes who get offended at the least little things said to them.