Failed my compTIA A+

I have been studying A+ since August of last year. I felt prepared to take the test today. The instructor I had didn't believe in me. At the end only me and 5 others were able to take it. It was a class of 25. He would insult me, make me seem stupid, and tried making me and the other students do other certifications because he said we didn't have enough time. I went to the testing center to take the test today and failed. Passing score is 675. I got a 651 During the test I felt confident. I felt like I was for sure passing. But it didn't. Now I feel so worthless and stupid. After all everything treated me like crap, and they all didn't believe in me. I wanted to prove them wrong. Yet I failed. All I did was prove them right. I can't believe I failed as well. I pulled all nighters studying. I had the highest grade in all the test, every practice test I took I got above a 900. I decided I am going to study more privately and take it again when I am more ready. Do you guys have any tips?

Edit: I won't give up. If anything the fire is stronger. I not only want to get A+ more, but I want the whole trifecta.