I ended up subscribing to both Nebula and Dropout.tv, especially after noticing that a good portion of my favourite YT channels are in fact on Nebula. Sadly, this is primarly larger ones, and I do feel bad about smaller creators being kinda stuck on YT… especially when it's the odd one-time well-made video that really doesn't warrant e.g. Patreon.
But yeah, the real moral quandry is with the creators. They're more or less under the same monopoly pressure; in most cases you just can't ignore the YT audience :(