I've used password managers for as long as I've used the internet. I find it absolutely essential.
If you're not currently using one, it's likely that as the number of your login credentials increase, bad habits will increase. So it's probably better to use a password manager any way.
If you're using good, separate password, saving logins in the browser might work for you too. In that case I'd suggest you read up on the security your browser provides, ability to sync, migrate etc.
What good will outrage/protest do? It's time to migrate. Reddit was built by volunteers who can build it again. Lemmy seems like a good choice, but time will tell if it can be the next front page of the internet.