Nah, Twitter just seems full of leftists to you because you use the "both sides" or "what about" argument, a common conservative talking point. You think arguments like hey, let's use a word like "latinx" to be a far left talking point. It's silly, but the position is nowhere nearly as radical as "let's get rid of all governments, by force if necessary". The extreme left views to you seem to be to get rid of Dr Seuss. You can't even think of even more extreme left views as viable discourse, such as getting rid of all world rulers.

There aren't nearly enough leftist talking points on Twitter as it appears to your rightist brain, and there's plenty of homophobia, "feminism has gone too far", "it's okay to be white", worldwide anti-immigration sentiments, and (still!) Trump supporters. Maybe they're bots or whatever, but the talking points are there.