Jay Saunders criticised Maidstone’s finishing in their 1-1 draw against Solihull Moors.
Joe Pigott gave United the lead after 42 seconds but several chances went begging and they paid the price.
The best opportunity fell to Johan ter Horst who hit the bar after rounding the keeper.
It wasn’t quite Ronnie Rosenthal for Liverpool against Aston Villa but not far off.
Stones drop a place to sixth while Moors, under new manager Mark Yates, move off the bottom.
Maidstone boss Saunders said: “If you don’t take your chances you don’t win games of football. It’s as simple as that.
“I don’t know what it is at home. Away from home we seem very clinical, taking our chances and killing games off.
“No matter who you play at this level you’re always going to have spells in games where they get chances.
“They took their chance and then it becomes panicky but first half the game should be dead and buried.
“We should be 3-0 up and out of sight. I’d like to see Pigs’ one again, I’m not sure if he was offside, and Johan has to score.
“You’re then looking second half, Pigs has got to score, people say it’s a good save but he hit it straight at the keeper from five yards.
"The finishing just wasn’t good enough and then it becomes a bit scrappy against a team that obviously are fighting to get out of the position they’re in.
“A new manager’s come in and they’ve worked really hard for him – I’m sure he’s delighted – but you have to kill teams off.
“In the first half I don’t know how Johan misses that. It’s harder to miss than it is score.
“He does everything right, goes round the goalkeeper and then for some reason laces it and hits the crossbar.
“At that point, 2-0 up and you’re more comfortable in the game and we just couldn’t get that second goal.”