Billy Barr was left frustrated with his side who lost at Middlesbrough on Saturday, despite being the better side for parts of the game.
Two early Stephen Walker goals handed the hosts the advantage at the break.
But Rovers battled back and grabbed a goal through a well worked John Buckley free kick.
But despite trying to find an equaliser, Rovers were dealt a sucker punch late on, with Boro adding a third through substitute Layton Watts.
And Barr was left ruing mistakes from his side, who had a mixture of Under-16s and Under-18s in the side.
"We gave the first goal away with a mistake from an Under-16 player - Enzo Boyomos. It’s all part of his development at his age. It came early on and after that he did really well,” Barr began.
“We then conceded from a throw in not long after and it was a cheap goal to give away.
“We made changes and opted to give others a chance. The team just lacks cohesion at the moment as we have Under-18s that are sweating on contracts, Under-18s like John Buckley that have contracts and new Under-16s who are a little bit raw and lacking experience.
"We had words at half time. We said they worked harder than us and we did improve after the break.
"We got back into it ten minutes into the half. Buckley’s free kick routine worked well and he scores.
"Hopefully he can take lead hand on that. We give them freedom when it comes to set pieces to come up with something creative.
"We're back in game. We had chances and were the better team second half. We end up giving possession away and that led to a really shabby third goal to give away.”
It’s been a bit of a disappointing campaign for Rovers this term, but Billy does feel there were positives to take despite the defeat.
“It’s been a long season for us on weekend days but it’s pleasing to get players through the system and into the squads,” he added.
"Ultimately for the group if you don’t win games then fingers are pointed. People have to take the chance. We had three Under-16s on pitch at the end, which is something to take.
"That was Dan Pike's best 90 minutes for us. Isaac Whitehall also did well coming back into the team."
Please note the home clash with Manchester City next week has been postponed.
Middlesbrough U18s: Brynn, Drummond, Hood, Robinson, Dale, Spence, Walker, Wearne, Dodds, Senior, Brahimi.
Substitutes: Watts, Cooke, Guru, Hemming.
Rovers U18s: Winterbottom, Jones, Thompson, Boyomos, Buckley, Paton (Connell, 20), Wilson, Vale, Pike, Burns, Dolan (Whitehall, 75).
Unused substitutes: Barnes, Campbell.