Your experience with social media largely depends on the accounts you surround yourself with.
I had an identical experience to yours on Facebook, but my Twitter accounts are carefully curated by topic and their timelines are generally excellent.
altruistic view : if you fix their service on your end, it invalidates portions of their feature A/B test -- a weaker signal means that it'll be less likely that they remove whatever feature offended you / made the service worse.
pessimistic view : they won't stop being abusive to the user until the abuse shows up on their financial reports. Stop being a patron, they'll be forced to change their ways.
OP could be referring to the overwhelming impact of Trump on Twitter and his penchant toward bullying and violence.
I don't log into Twitter. I don't "surround myself" with any accounts. Yet, the platform is inescapably branded by their inability to police their own content and I could not avoid if even when I tried.
I had an identical experience to yours on Facebook, but my Twitter accounts are carefully curated by topic and their timelines are generally excellent.