Wasn't he realtively new to the Enterprise in his first apperance? If his character traits weren't impacting on his ability to do his job what's the problem. It's only when they impacted on his ability to perform his duties that they became a problem which need addressing.
What about family? Childhood friends? Academy classmates? Fellow officers? Professional mentors? All of these should have been able to point him in the direction of counseling long before he got to the Enterprise