I had an oral exam at the university today. I prepared a lot for it. I passed the D and the lecturer said that she was not happy with me. Other people who passed got B and C. I feel worthless.
I've shared this story before, but I'll share it again because I think it might be worth hearing.
In my third year of university, I failed 5 of my 10 courses. Not even passed with a D — failed. And my grades for the courses I did pass were nothing to write home about.
I ended up getting a doctorate and becoming a professor for several years.
The moral of the story is that one exam doesn't define you. A year of bad exam's doesn't define you. Please don't assume you are worthless because of some bad grades. As a former educator, it's disheartening to know how much stock people put into what letter they get on a paper or exam.
I don't know you, and I don't know what other stuff is going on in your life. But I do know that the lecturer not being happy with you is not a valid assessment aid your worth as a person.