should i be concerned my brother is a rotter with no friends at 11 yrs old?

[brocode]

talk to him more, understand his real interests, which will be not be much, so slowly tell him about things he might find fascinating and guide him into turning into a real hobby and into a real professional life path.
keyword: guide, dont push it onto him.

do more activities together for him to be more receptive of ur guidance, and teach him good masculine ethics.