Something unpleasant from one's past that "haunts" them (makes them feel uneasy) to the present day.
rake over
To discuss something unpleasant from the past.
fly in the ointment
Something (especially a minor thing) which ruins or spoils everything …
now, more than ever
Used to emphasize the increased urgency or importance of something in …
put something behind one
To recover from an unpleasant or traumatic experience; to overcome a n…
shake off the dust from one's feet
To separate oneself from something unpleasant; to leave a place for go…
happy place
A mental visualization of a pleasant location, performed in order to a…