You can also disable it with a Group Policy too and delete any keys that were uploaded to Microsoft with manage-bde while adding your own keys, but for the average person Bitlocker is going to be how it comes by default.
Pre-builts are even worse because that's another party who has had access to your keys and there are not laws that they would violate by keeping copies (for your convenience, of course)
How about a modern fork of Truecrypt that looks and works exactly like it?
https://veracrypt.io/en/Home.html