Tbf to FSG, by their own admission they knew next to nothing about football... let alone running a football club. In those first 5 years they made a lot of mistakes in terms of developing us in a football sense, but Ayre did a lot for us on the getting sponsors to throw cash at us front - and over those first 5 years they've learned a lot and we're now in a position where we can drop insane amounts of money on players like VvD, Keita, Fabinho, Salah, etc., to build on the good work Klopp has done in a pretty meaningful way for us on the pitch.
But I do agree, we should be suspicious of any owner after G&H... and Moore, who was desperate to sell and ultimately put us in the hands of 2 dickheads who'd have us staring administration in the face with Roy Hodgson as our manager, who'd then tell the fans that draws against dogshite sides were "good results". But on the whole, I think FSG have been pretty ideal owners other than the fact they don't have the deep pockets of the oil clubs. But I also think that helps us be a real football club, rather than some plastic club that's really just an oil barons plaything.