I think it all depends on what you're setting the bar too...
If the bar is grinding out every single dollar you can and trying to hold your team hostage like Kirk Cousins is doing, then yes, it's bad... but that CLEARLY was not Rodgers goal.
Rodgers is getting paid $22 million per year... the highest paid guy (who just signed) is now being paid $25 million per year. If Rodgers wanted too, he might be able to go out and get more than $3 million in endorsement and advertising.
The cap currently is 167 million,
Rodgers is getting $22 million or a bit more than 13.17% of the total cap.
Car is getting $25 million or a bit more than 14.97% of the total cap.
Also remember Rodgers signed that contract in 2013
The cap in 2013 was $123 million, so with $22 million Rodgers got above 17.88% of the then cap.