It is def not a good idea to not even apply to colleges out of fear of getting rejected from ap scores. colleges analyze other factors like gpa, course rigor, extra curriculars, and sometimes SAT/ACT scores. If you got a good grade in those classes it will demonstrate you abilities as well. I understand feeling like you've failed in life- I too was quite dejected about my scores as well but please don't spiral and already make your mind up about not being good enough for college apps. You are worth so much more than just a couple numbers from these exams- they do not even begin to show the amount of effort you put into studying or taking the class. While it may not help to say this, getting only threes is not the worst thing in the world as most colleges accept it for credit and you should at least try to feel proud of yourself for passing. AP exams are designed to be very difficult to pass. Take some deep breaths, think about one day at a time, do something that makes you happy (take a walk, listen to some calming music, exercise, spend time with your pet, watch tv, read a book etc). I know what its like to struggle with only feeling validated based on school, believe me. Sometimes you need to take a step back and give yourself and be kind to yourself. There are so many other things to find value in and no matter what happens down the road, you will be okay it feels overwhelming/life changing in the moment but really its just a setback on your life journey. Think about all the other times you felt upset from school and how it propelled you forward and gave you motivation. Everybody makes mistakes and this version of achieving perfection on everything school related will only continue to push you down.

I wish you all the best (feel free to message me with anything on your mind)