Patrick Maclellan of Bombie (d. c. 1452) Sheriff of Galloway, then the head of his family, the Clan MacLellan, and a staunch royalist declined an invitation to join William Douglas, 8th Earl of Douglas, along with the Earls of Ross and Crawford and Ormond in a powerful alliance against the young King James II of Scotland.
Maclellan never had disagreements with the the King
All we know is that Maclellan was a royalist. We do not know whether are not he ever had disagreements with the King as that is not addressed in the context. 
( z1 disagree :polarity - :ARG0 ( z2 person :name ( z3 name :op "Maclellan" ) ) :ARG1 ( z4 king ) :time ( z5 ever ) )