Despite leading 2-1 at half-time, the Moors left with nothing after a 3-2 defeat.
"We were comfortable, but we gave a goal away with a set-piece, you can't go away from home score two goals and not win," Ainsley said.
"You don't deserve anything when you concede the goals like we did.
"The amount of games didn't cost us, it was the defending, the league we are in is tough, you compete against top team, you can't just give goals away like that."
Ainsley says the ambition of the club is simple as they get ready to face Alfreton Town on Saturday.
"The aim is the play-offs, we have been there all season, ultimately, you end up where you deserve to be.
"We normally end the season strongly, it is a quick turnaround to face Alfreton but we go again."
Picture by DJ Nelson Photos