I am trying to describe a male main character that grew up in a less friendly family. Can I say he is a cold and quiet introvert or less engaged?
Research the character traits of men who grew up in a dysfunctional family, then put those traits into the context of your story so it advances the plot in some relevant way. Think carefully whether you want the reader to see those traits as mannerisms (shoulder shrug, body language, frown...) or hear (read) them as dialog between your main character and one or more other characters. Good luck! Well, maybe not luck, but certainly a lot of free (discovery) writing and revision.