Morecambe boss Jim Bentley says the FA Cup loss at Conference strugglers Dover was his worst moment in management.
The League Two side were beaten by Stefan Payne's first-half strike and have gone out in the first round in five of the last six seasons.
The result continued Morecambe's recent poor form, as they have now lost five of their last seven matches.
"I've got to be honest, it's the lowest I've been as a manager," Bentley told BBC Radio Lancashire.
"We're not having a great time at the minute, a couple of sticky performances, but it's the FA Cup so that goes out of the window."
Their recent run is in complete contrast to how Bentley's side started the League Two season, winning their first four games and sitting in second place on 13 September.
Morecambe's travelling fans showed their frustration at the players and management as they left the Crabble Ground, and Bentley believes the criticism were justified.
"Our crowd had every right to have a a go at us when we're walking off the pitch," he added. "I've not had that as a manager, but I take it on the chin.
"I've got big enough shoulders to take it and the players can't expect people to feel sorry for them.
"Now we're having a little bit of a wobble, we've got to stick together, work harder than we have already and stand up and be counted."