How does McMurphy's realization that he is committed for an indefinite amount of time affect his plan to bring down Nurse Ratched?

It really puts his plans on halt. McMurphy is really blindsided by this. Underneath is quick wit, he is actually scared. McMurphy understands that "she holds all the cards up that white sleeve of hers."McMurphy's powers of manipulation are nullified as he discovers there is no way out.