His qualities just aren't great at carrying poor teams. KG had a similar (but much more minor) problem when he was stuck with poor personnel in Minnesota, his passing, defence and shooting unlocked the potential of his teammates, but he couldn't ramp up his scoring if his teams needed a big time scorer who could score oodles of moderate to high efficiency points.
I think Draymond has declined from his 2015-2016 season (that year was nuts, he was a DPOY calibre defender who provided great complementary offensive value with efficient outside shooting on high volume and great passing), but he's still an All-NBA frontcourt player due to his defence (still insane) and passing (hasn't really declined).
This is crap. KG was an all-nba type of player even with mediocre teammates. The one season in minnesota where he got some borderline all-star teammates? He got MVP. Green is nowhere that.
That's why I said much more minor (Garnett could score really well, but he couldn't be an offensive anchor like Dirk/Duncan). What you're saying is crap if you don't see the similarities between prime Draymond and KG: both provided floor spacing, elite defence, great passing but imperfect scoring (obviously Draymond is much worse at scoring, that's why Garnett is an MVP player while Draymond is an All-NBA guy).
KG had difficulties in leading some Wolves teams that needed resilient playoff scoring to deep playoff runs while his contemporaries that had more floor-raising friendly games (Duncan, Dirk) lead some similar teams to deep playoff runs (eg. 03 Spurs, 06 Mavs). This is similar (although to a much larger degree) to what Draymond is experiencing right now: he's fantastic as a third/fourth banana in terms of scoring (KG would ideally be second, he's way better than Green at scoring) that'll raise the ceiling of teams through the roof, but will struggle to raise the floor of subpar teams that need a floor raiser who can do the heavy lifting, and in Draymond's case he can't do any significant floor raising at all due to his scoring regressing to craprastic levels (jumpshot is gone). This isn't Draymond getting exposed, this is him in the worst situation possible for his skillset. It doesnt change the fact that he's still an All-NBA calibre player (maybe All-Star if you look at him in a more negative light) due to his unique skillset, even after his regression into a non-shooter.