Stags looked to be on course for a first win in six league outings after Kane Hemmings had fired them in front 18 minutes in, before former Derby County winger, Mansfield-born Lee Holmes, levelled four minutes from time.
Evans, who thought his side “bossed” the One Call Stadium encounter in what he described as a “terrific” performance admitted not getting the second goal cost his side the chance to close the gap on the top seven, which remains at five points.
“We made the chances and we didn’t take them, and that’s what’s cost us, not Exeter scoring at the end. In the second half, we missed four or five good, simple chances. If the second one goes in, I think the game’s over,” bemoaned the Scot.
“The bottom line is we bossed the footballing game, we bossed the aggression, we bossed the chances but one thing about Paul’s (Tisdale) teams is they always go to the end.
“They’re always committed and we switch off. One of our players doesn’t match a runner and the runner scores. The boys didn’t deserve that today.
“The performance was terrific. We bossed it from start to finish, we made all the chances and they sucker-punched us at the end.
“You can call it ruthless or you can call it missed chances. We missed a couple in the first half as well to make it 2-0, but some of the chances in the second half, they couldn’t have been any easier to score.
“If you don’t take them, 1-0 is never enough in any game of football and you run the risk of getting punished, and we did at the end.”
Stags remain without a league win since the 3-1 success over Notts County at the end of September, and the stalemate with the Grecians was their third in a row, something Evans admits needs to change.
“We’ve bossed a lot of games, but we need to win some games,” he said.
“We’re just down because the performance was very good. I feel for the players, I feel for all of us. It would have been an important day to win a game. The fans here were brilliant, they’ve been brilliant since I came in the door.”