Hi @znam and welcome to Ask Fedora!
Logging in as root usually gives you power to resolve most issues preventing normal boot/login of your system. Of course, you have to have some idea of what to do, it won’t resolve itself.
The issue at question on this page prevents people from accessing recovery console – even for people who do know what to do once there – and for completely unexpected reason. That was the reason for this post – not as a way to solve any issue, but as a way to login to recovery console, nothing more.
One of the most often encountered reasons (but not the only one) your system dumps you to emergency console is it can’t mount your root or home filesystem. Quite often in such a case you can run fsck manually from a recovery console to resolve some filesystem issues.
For more specific help you need to create a new topic explaining your problem, provide any error messages you can see – either as text or as screenshots. The reasons for boot failure are different, the solutions will be different as well. To provide any help / advice we need to know, what’s the actual problem in your case.
Edit: I see you’ve already created a new topic. We can troubleshoot your problem there.