This is false.
Marners comparable was matthews and he got less money but more term. Matthews had 70 points and got 11.634 x 5, marner had 94 and got 10.9 x 6. If you want to be upset with someone, it should be directed at matthews and dubas. If matthews takes a reasonable deal, say 11.3 x 8, marner isn't getting 10.9 x 6.
Nylander took more money than pasta and ehlers and completely wasted an entire year of it. It takes more than 1 good year to make up for that.
Marners comparable was Kucherov or Kane's post ELC contract not Matthews. Matthews is a goal scoring C that is good defensively and his closest comparable was Eichel.
At the time of the signing in Caphit%:
Marner - 6 years x 13.37%
Kucherov - 8 years x 11.95%
Kanes post ELC - 5 years x 11.09%
Matthews - 5 years x 14.63%
Eichel - 8 years x 13.33%
Nylander did not take more than Pasta but did take more than Ehlers
Nylander - 6 years x 8.76%
Pasta - 6 years x 8.89%
Ehlers - 7 years x 8%
As you can see Matthews term and Marners cap hit are what varied most from the comparables which is why I am happy with neither.