We've probably all met a friend who looks bored with everyone and says "I can't" all the time. Are you also curious about what he's really trying to say?
Hey, buddy! I can feel your concern. Don't worry, let's talk together today and pick up the reasons behind this behavior to help you understand him better.

First of all, a lot of people are too hard on themselves. Whenever something goes wrong at work or in life, they tend to take all the blame and feel bad about themselves. For example, if they make a small mistake at work, they may think, "It's all my fault," when in fact it's not that serious.
This, coupled with his long-term lack of self-confidence, makes him always feel inferior to others. When comparing himself with others, he stares at his own shortcomings and magnifies others' strengths, so that the more he self-denies.
Also, if a person is in a state of depression, he may feel worthless and lose hope for the future. That kind of listlessness may be a sign of depression. When he says he is "stupid", he is actually venting his inner pain. The same applies to anxiety. When the pressure is high, he feels that he can't cope with the situation and that he is particularly useless.
However, sometimes when he puts himself down so much, he may also be trying to get attention. For example, if the family is busy and no one cares about him, he seeks comfort in this way. Deep down, he expects someone to talk back to him, compliment him on his strengths, and help him find his self-confidence. When he says, "I'm a loser," he's actually waiting for the words, "No, you're not, you're very good.