Picture two kids at recess. One always says: “I know everything, I don't need anybody!” He never asks for help, never takes advice, and when he messes up, he gets angry at everyone. That kid ends up alone, because it's hard to be friends with someone who thinks he knows it all.
The other kid does it differently: when he doesn't know something, he asks. When he messes up, he admits it. When he needs help, he asks for it. Then friends show up, the teacher helps, and he learns much faster. Proverbs 3:34 is talking about exactly that: God helps whoever is humble.
Jesus, who was the Son of God, washed the disciples' feet, played with children, stopped to listen to those nobody else listened to. He showed that humility isn't weakness, it's the greatest strength there is.
Being humble isn't thinking less of yourself. It's having the courage to ask for help.