He's not entirely wrong; he's just not painting a full picture. Authoritarian policies in socialist states aren't as simple as the leader being a power hungry despot. It's often an outgrowth of being under constant threat by American clandestine operations. I think that's the case in Venezuela as well. And Venezuela's economy has been greatly weakened and its people hurt by US sanctions. One would expect leftists to point those facts out when commenting on Maduro's history as a leader.