However I do not relate to your experience of it. Over the years I've curated a nice set of people to follow and I've had extremely rewarding experiences. I've learned a lot, invested in companies, received investment, all stemming from interactions I've had on Twitter.
I definitely occasionally see some of what you're talking about and it creeps into my bubble but I'm diligent about tracking down how it got there and unfollowing whoever pushed it into my field of view.
If I can be frank your post here is an example of the kind of stuff I usually push away. Fairly absolute stance with little articulation/empathy of the opposing viewpoint. Taking some of the genuinely negative behavior and implying it must be the entirety of everyone using Twitter.
Twitter tends to reflect yourself and if you're honest with yourself you'll often see that you seek out the things that upset you.