Okay, then lets just look at Matthews numbers since he entered the league then, and compare them against every NHL forward who has played more than 1000 minutes in that time frame.
He's 1st in 5v5 goals
He's 4th in 5V5 Primary points (Behind McDavid, Kane and Kucherov)
He's 10th in total points at 5v5 (Behind McDavid, Kane, Scheifele, Kucherov, Tarasenko, Zetterberg, Panarin, Marchand and Crosby)
He's 3rd in xGF at 5v5 (behind Crosby and McDavid)
He's 1st in ixGF at 5v5
He's 4th in all situations goals (behind Ovechkin, Crosby and Kucherov)
He's 7th in all situations primary points (Behind Kucherov, Crosby, McDavid, Kane, Wheeler and Scheifele)
He's 15th in all situations total points
He's 5th in primary points per 60 in all situations (Behind Crosby, Guentzel, Malkin and Kucherov)
He's 6th in primary points per 60 at 5v5 (behind Malkin, McDavid, Kucherov, Marchand and Anders Lee)
He does this while being a good possession player (above 50% in raw possession stats and being a positive guy relative to his team). Also, a bunch of those guys play with better linemates than Matthews. Schiefele always has one of Wheeler or Laine on his wing, while Matthews has Hyman permanently attached. Kucherov has played all this season with Stamkos (although he has looked great with lesser partners). Tarasenko is probably the only guy mentioned who consistently played with a player worse than Matthews at 5v5 (Lehtera). He's carried lines with fellow 1st and 2nd-year players since day one, never getting extended time with any veterans outside of the powerplay.