I think INEOS have been ok, they've appointed what appear to be good people in the right positions. My initial worry is that they rightly decided to sack ETH, and then bottled it. They should have decided what to do before the FA Cup final, for example - if he wins, back him immediately the following day, if he loses, then sack him.
Since he's been here there's been one run of decent form, in the latter part of his first season, which lasted a couple of months. Aside from that things have been completely dire on the pitch.
Spending has increased significantly during ETH's tenure, yet performances have regressed and continue to do so.
I also don't like how ETH carries himself, he seems awkward and unclear in what he's saying - funny how that's translated onto the pitch.
The argument about sacking managers is not a reasonable one - most of the appointments since Fergie have been managers on the decline such as LvG/Jose. I think Solskjaer actually did well in light of his limited skillset. Even Moyes is a better manager than ETH and look how that went.
I think the hopes of him turning it around are just a fantasy at this point, clung to by fans who clearly haven't been watching properly for the past 2 years.