MINNEAPOLIS — Adrian Peterson took to Twitter on Thursday to express his frustration over criticism he is receiving while staying away from the voluntary portion of Minnesota Vikings’ offseason.

The former NFL MVP has come under scrutiny from fans after saying he wanted a long-term commitment from the team despite the fact that he missed most of last season while addressing child abuse charges. He has three years and about $46 million left on his deal, but none of that is guaranteed.

“A (little) crazy how one side has so much power that they can do as they please when it come to the contract!” Peterson tweeted. “But when the other-side (player’s) feels for whatever reason! Family, Change of scenery or simply — what they feels just might work best for them! Those same laws don’t apply!”

Peterson skipped the first three-day set of optional practices this week.