Healthy communication is very important in any relationship. I think it's a great idea for you to vent in a healthy way and it is equally important for your boyfriend to listen to you and be supportive. Yelling at you and belittling you is emotional abuse. It is okay for him to feel frustrated because he can't do a quick fix on your problem. But he needs to process his frustration in a healthy way. You need to feel comfortable and safe to express how you feel. Your boyfriend could be more helpful to you by just talking you through the situation in a calm manner.