It's your fault for buying into anything that big name YouTubers are shilling. Those will inherently be designed where you rely on a third party, the reason they pay for those ad spots is because they earn money off of you using the service in one way or another.
Wanna know a cool password manager that isn't advertised anywhere? KeePass. At it's core it's just a FOSS file format for an encrypted password database, and you can use any client. The popular ones are KeePassXC for Windows/Linux and KeePassDX for Android. You set a master password for your database, which encrypts it's contents. You can set how strong the encryption should be, whether or not it should require 2FA to unlock and so on.
With KeePass, you have a local file in which all of your passwords are stored. Like a text file, but better. Synchronization and backups? Syncthing for syncing between devices and Unison for syncing between drives. Someone stealing your file? First of all, if you've set a good master password and strong encryption, they won't be able to do shit, as no amounts of brute forcing will allow them to access the database. Second, for a malicious actor to obtain this file, they'd need to essentially get remote access to your machines, by which point you have much bigger issues than how to manage your passwords safely. You forgetting the password/losing the file? Well if you're retarded then that's a you issue, my current database dates back to 2012 when I first started using KeePass and I never lost it, nor did I forget the password.
This is a common mistake people make when it comes to security. They go full schizo without understanding the technology and taking a realistic risk assessment. With KeePass, your chances of getting hacked are one in a trillion. Are you so important that someone would go through all the effort to obtain access to one of your devices, then to the database and somehow managing to decrypt it? No, and in most likelihood it'd go something like xkcd 538.

With LastPass, it was begging to get hacked. A gigantic central server full of people's personal passwords. It's like comparing crashing a plane into WTC and blind headshotting someone through multiple walls on the first try.
By the way, what all kinds of cyber criminals really love are database leaks. Your password manager has an extremely low likelihood of getting hacked, but the sites you register on will have a data breach sooner or later. By then, your login and password will be available online, and if you believed that using multiple passwords was too much of a chore, guess what happens. With a password manager you avoid that situation, since a leaked password becomes useless on any other of your accounts tied to the same e-mail.