It’s not bad, you did not reach the passing grade on this mock test. Period. Don’t frame it emotionally, that will only backfire.
Continue learning. Depending on what resources you use, calculate how much learning you need to do daily to complete it before the exam and continue (for example if you do N5/ N4 level grammar, vocabulary). General learning, like listening to podcasts, reading, continue as usual.
Leave the mock tests for now, restart once you finished what you wanted before the exam. If there will be no such point, aka you do not finish grammar, etc, don’t panic. C’est la vie.
Start mock exams max 4 weeks before exam, otherwise you will burn out. You have to be familiar with the test structure, so even if you did not finish what you wanted, you need to do mock exams before the actual exam.
Don’t listen to people who say the JLPT is hard and build up some scary ethos around it. Other people passed it, you can pass it too.
Edit: consider your goals in light of the JLPT. Why do you learn Japanese? Do you want to watch anime in original without subtitles? Do you want to speak Japanese with your Japanese friends? Do you want to travel to Japan? Read manga? Read Murakami Haruki in original? Write a fan letter to your favorite Japanese artist? Watch your favorite vlog in original?
Do you need the JLPT to do these? Nope.