This thread sort of angers me. First of all the OP too easily skims past the part where he says Ole is responsible for how poorly we defend. Strikers are involved in defending, whether it's tracking back or pressing (the latter includes cutting off passing options as well). Most of the criticism I've seen of the Atalanta game is aimed at the poor defending, so what does the finishing of our strikers have to do with that?
Second, yes, Greenwood didn't have a good game and Rashford+Fred missed a few chances, but it shouldn't take 3 goals to beat an average (in CL terms) team at OT.
And 3rd, the premise sort of implies that we're giving Ole stick for one game. He's been managing for 3 years and has botched chances at (minor) trophies in contrast to his predecessors and the vast majority of reasonable criticisms of Ole (almost by definition) look at the full picture.
We're doing a lot of things wrong under Ole and this game reinforced those existing criticisms, it's not about one game, but if it was, our defensive organisation is criminally bad and there is not enough structure in the way we go about creating chances. People can hate on the "pattern of play" line all they wanted, but plenty of footy fans could give you a rough description of how City/Liverpool/Chelsea go about attacking. I wouldn't have a clue where to start for Man Utd were I asked.