Felix Buttonweezer, grief stricken after the death of his cactus
Felix Buttonweezer, white knuckled sobriety a daily challenge
Felix Buttonweezer, gifted surgeoun suffering from PTSD
Poor old Felix. Someone read that heros need flaws so they give him some.
Except illnesses or states of mind are NOT flaws.
Illnesses do not strike due to faulty decisions, or lack of self-awareness, or hubris.
Grief doesn't come only to the undeserving.
CHARACTER flaws are what the main character needs.
If you don't know the difference, stop querying.
If you don't know the difference, go back to your reading and watch for what flaws the hero has, and how it affects the story.
Start with Michael Connelly, Dennis Lehane, Catriona McPherson.
If you need a perfect illustration, Prince of Thieves by Chuck Hogan.
My suggestions are all crime novels of course. If you've got others, please use the comment column to tell us about them.