Unfortunately, yes - updating nvidia drivers is a constant issue with linux (it’s not strictly related with Manjaro), but I understand and share your frustration. IMO, Manjaro should do something about it. I had similar issues during each and every nvidia update.
If you prefer stability over rolling distros, you may consider installing Debian based linux. I personally still like Manjaro as long as the projects I use are well documented and the community is responsive enough.
Running a linux desktop in general is like becoming owner of a boat. You’re the owner, captain and the only skipper (mostly the only passenger as well), in opposed to commercial systems like Windows and OSX, where you just pay for the license and could fully start ■■■■■■■■ loudly to their customer support, asking for your money back anytime you want. When you’re at the open sea in your boat and something starts failing within your system, you better know A LOT about mechanics and electronics of all the equipment you’ve got there. If you don’t, you better start reading some books really fast, since the boat is about to sink and you’re running out of time. Well, it’s not as extreme as that, but you get the point. Preparation is the key.
If you decide to stay, I would strongly advise to rely on a system that is more bullet proof by implementing a solid backup/restore routine and actively use it before each update i.e.:
You should consider to become familiar with reading PKBUILDs before any update and reading documentation to avoid similar issues. But in case you run into anything like this in the future, you can simply restore your last backup, postpone your update and don’t hesitate to report promptly your issue here, to the community, providing lots of necessary technical details. That way you will become an active part of our community, not only a bystander/leecher. I believe that the real power of every linux distro is in persistence of active members of its community.