Right now the #1 alternative is Odysee. While Odysee itself is a centralized company its just as open sourced front end for the decentralized LBRY block chain.
As of now Odysee has far more videos, features, and download speeds then any other YouTube alternative.
If you're interested in supporting an alternative I reccomend downloading the "watch on odysee" extension which redirects YouTube videos that areavailible on Odysee, to Odysee. (Firefox) (Chrome)
If you don't like it, then fork the and start your own curated version of Odysee. That's the beauty of federated software.
And while yes in its current state the userbase is pretty toxic; that's the price to pay when you have a platform with total free speech. The early adopters are always going to be the ones who rely on it the most (unsavory individuals). However this is no argument against free speech in the same way that criminals being the first ones to adopt privacy related projects, is no argument against privacy.