Sister Yan, I have encountered such a situation. Sometimes people really make me doubt my IQ, EQ, ability and luck. In particular, sometimes I feel that I am diligent enough, hardworking enough and perfect enough in my work, but when I come alone, I solve the problems I have been dealing with most of the time. I really feel that my ability is poor and my IQ is not enough, so I am so miserable.
But then again, there are days ahead, and there are mountains outside. Naturally, there are more people outside us. Our IQ, EQ, ability and luck all have certain limitations. Don't be too hard on yourself, but be clear. Even if some people sometimes make themselves doubt their IQ and their ability, don't care too much. A person's ability and time are limited, and so are his energy and feelings. Keep all this to yourself, and don't let others affect your performance, even if your IQ is really not enough and your ability is really not strong, don't give up on yourself.
Only when people are confident enough can they gradually accumulate experience, wealth, work ability, exercise IQ and learn EQ well. In this way, we will continue to grow and progress in front of experts, and one day, we will become strong.