looking at the last few games, it was not Mac, the team is not clutch as a whole!
Mac drived down to the RZ for Stephenson to fumble the ball against Cincy with a 0-18 comeback (though that was on the refs), he throw a TD vs the raiders for the defense to go in bend and break mode vs raiders and conside a stupidly easy 1min 90yards drive TD with the game on the line to than have such a clutch play (call) and execution where Meyers throw an INT right into the defenders hands for an easy TD
yes Mac has not shown to be elite so far, but come on that was not on him, as well as yesterday when the game was on the line he executed as well, just for other non clutch parts of the team to almost give the game away
its a team sport, you can be elite QB and its still depending also on the execution of the other 52 man during the game