Am I weird?

[18M]

Hello yall, I have a weird thing about me and it is that whenever I do something for someone or they compliment me, for example telling me that I'm smart or good looking etcc, so after that I completely deny it (not playing humble, I genuinely don't believe that I have such qualities),

So is this normal? I'm really confused, I'm trying to think about the reason of this and some possiblites are low self esteem and the very low confidence, I would appreciate any insights/solutions (if it's a problem cuz I'm not sure what it is lol)

Thanks for reading ❤️