This must be why he fights with the parents.
Tá mé ag tástáil, Duo!
If you meant "I am trying", Tá mé ag déanamh iarracht might be a better choice.
tástáil means "try" in the sense of "taste" or "sample".
GRMA
http://www.teanglann.ie/en/fuaim/s%c3%a1sta
Would "The satisfied teacher is not with the students" not be acceptable?