Jason Hopkinson admitted he went home disappointed in his side’s performance for the first time on Saturday.
Jamie Bunn netted an 84th equaliser for Ringmer against Dorking Wanderers but still lost 3-1 at after Dave Stevens scored twice late on.
The Blues boss said: “I was really disappointed. We are playing some wonderful football but are just lacking that killer punch.
“Earlier in the season we were getting caught out. We’ve improved but we’re still too easy to break down.
“Because of the way we play we do get caught. We just need to react quicker. We push the full backs high up and try to play the right way.
“For the first time on Saturday I went home disappointed. They are working hard in training and are even training before games and after games as well.
“0-0 was probably a fair result at half time. But we came out after the break and missed chance after chance. Then we make a horrendous decision and get caught.
“We scored a magnificent goal to get back into it with just six minutes left but shot ourselves in the foot. We were too naive pushing forward.”
He said with Billy Trickett unavailable on Saturday “when we took (31-year-old) Aaron McMillan off the average of the side was 20.
“They have got to understand the game a little bit better, when to sit back.
“But we will get there. We’re working ever so hard.
“I’m a coach and if I’m going to say something I’m going to say something constructive. I rarely get angry but I did on Saturday, and I gave some of the players one or two harsh words.
“It’s not something I’m ever going to say in public but I gave them some home truths.
“Perhaps I have got the balance wrong and I maybe need to get one or two more experienced players in. I don’t think I need to but I can’t let it keep happening.
“But I did get a positive reaction training last night.”
Of Hassocks who Ringmer play in the FA Vase tomorrow, he said: “They are very organised. We respect our opponents and the game but I know on our day we’re capable of giving anyone a game and beating anyone.
“Five or six of these players are playing at a level that’s below their genuine level. I want them to be playing at a higher level... with me.
“They have got potential.”
Trickett is available again but Jordan Stubbings is unavailable, as is Seb Saunders – who is serving the last of a three match suspension – and Josh Clifford.