Newcastle boss Eddie Howe admits relegation with Bournemouth was a career low.
Howe went down with the Cherries in the 2019/20 season.
He told the Overlap: “Definitely the moment in my management career would be relegation from the Premier League.
“I'd given so much to the Bournemouth job and I cared so much about the team and club's success.
“I was so involved with that emotionally, living in the area, coming through the youth team there, I was Bournemouth through and through, so I really felt that pain and I felt like I'd let everybody down.
“I knew then that it was time for me to leave, I had no more energy to give to help the club get back up, I was spent on energy and needed to recharge myself.
“That stayed with me for months and months.
“Ultimately, it's probably helped me, to come out of that period refreshed, refocused, and it helped me learn.
“When you are perceived to have failed, I reset, re-evaluated and then hopefully come back better."