Frayssinous believes that Escare is being targeted by teams, who are using underhand methods to try and unsettle the youngster, with matters reaching a head during Saturday’s win over Castleford.
“I am angry and frustrated. I’m really worried and concerned about the way Morgan Escare is being treated,” he said.
“The opposition started to target him at the end of last season and it is happening this year.
“On Saturday he got a swinging arm to his face and also knees to his face while he was on the ground.
Frayssinous was also furious that no charges were levelled against Cas winger Justin Carney after his high tackle on Escare.
The French coach felt that the incident was at least as bad as the high tackle which saw Widnes winger Patrick Ah Van sent off the week before in a game against Wigan.
“The referee only gave a penalty,” he said.
“There is no consistency. I have spoken to the boss of the review panel. My biggest concern is how to protect my players.”
“Two of my boys lost control and I am really angry with them,” the coach added.
“What happened in the 80 minutes is tough to take but I don’t want my players to take matters into their own hands.”