There is a line between defending Yelich and recognizing that blame in certain areas is incorrect. Is he living up to the contract? No, of course not. However, he shouldn't be to blame for signing it (the Brewers offered), and his decline does not appear to be because of anything he has done negatively (lack of effort, prior PED use, etc.).
As for Stearns, he has earned some benefit of the doubt; however, myself and many others have been ALL OVER him for this year's deadline. Not necessarily the Hader move on its own, but the way weaknesses weren't addressed and how it seemed like selling while they were in first place. And as I say in this article, he didn't adjust to Yelich's slide enough - if at all - to improve the offense.
Lastly, yes, the Brewers are hurt by large contracts with little production - more so than many other teams. However, as has been studied and reported on many times, MLB teams typically make a ton of money every year. There is always room for more expenditures on payroll, and especially when you might be looking at a 2 or 3-year window with talent to get you a Championship. Plenty of "blame" to go around if they can't take advantage of the pitching they have had during this run and get to a World Series.
Thanks for the answer Tim, I guess my questions are part of a larger problem of how frustrating it is to follow a small market team while watching the front office stop going for it all in the name of remaining competitive. It is a good way to make the playoffs but never really win anything. I don't know what to think about this idea.