Every single one of Gretzky, Lemieux, Lindros, Ovechkin had top 10 scoring teams by their third year, McDavid is the only one of that group that was way down stuck on a team with the 20th overall offence at year 3.
They've built a very unskilled team around McDavid, one that rarely creates or does anything anytime he is off the ice, and they have not added any significant skill to the roster in 4 summer's time.
Instead they've chosen to build around McDavid a bunch of low skill players like Lucic, Russell, Larsson, medium impact guys like Sekera, Strome, and plugs like Caggiula, Benning, Kassian. They have amongst the lowest scoring D in the league.
McDavid works with less talent than other good players in the league.
Matthews +
Tavares (84 points) w/o Matthews
Marner (69 points) plays usually w/o Matthews
Nylander (61 points)
Kadri (32 goals, 55 points) w/o Matthews
Reilly (52 points)
Gardiner (52 points)
Laine+
Wheeler (91 points)
Schiefle (60 points in 60 games)
Connor (31 goals, 57 points)
Ehlers (29 goals, 60 points)
Byfuglien (45 points)
Myers (36 points)
McDavid+
Draisaitl (70 points) play 50% of time w/McDavid
RNH (24G, 48P in 62G) played last stretch w/McDavid
Strome (13 goals, 34 points)
Lucic (10 goals, 34 points)
Puljujarvi (20 points)
Reider (13 points last year) *big add of the off-season
Klefbom (21 points injured D)
Nurse (26 points D)
Gaudreau +
Monahan (64 points)
Tkachuk (24G, 49P in 68G)
Neal (25G, 44P)
Lindholm (44 points)
Backlund (45 points)
Giordano (38 points D)
Hanifin (32 points D)
MacKinnon +
Rantanen (84 points)
Landeskog (25G, 62 points)
Kerfoot (43 points)
Soderberg (37 points)
Barrie (14G, 57 points)
Johnson (25 points in 62 G)
Not even gonna list Stamkos/Crosby/Ovy as obviously they are also on much more talented teams.
McDavid probably has the least to work with, this franchise has accomplished nothing but building an unskilled, grinder club around McDavid after pretty much now 4 full off-seasons. No one has a worse offensive core of players and no one has less offensive help from his blue line.
Flames/Avs are nothing special but bubble teams, Toronto and Winnipeg are clearly way better, but McDavid still probably has the least to work with.
Eichel and maybe Hall are the only other star players that have less to work with, and that shifts real quick if Dahlin is the real deal and pending Hischer's development, both being no.1 overalls.