No, we shouldn't. That 'ghost' goal happened in the first half and there were still nine games to go after that one. We could also point to the game at Palace earlier in the season when we had a perfectly good equaliser from Lansbury not given, which was later admitted to have been a mistake. So, the Sheff U goal was karma for us not getting that palace goal. Although every single decision that goes against us since this goal is seen as karma because of it. Quite boring now as much as its incorrect.
As for the Man U goal - it demonstrates to me that VAR is still not fit fir purpose. Rather than 5-6 minutes drawing lines for a kneecap being offside, or going back for a possible push, then back to see if someone brushed someone calf with their sock, it should be for moments like this. Yes, if the ref blows and a player stops or the game stops, but in this particular instance the blown whistle had no impact on what happened next. In rugby if a try is awarded and its seen to be incorrect the decision can be reversed. This should be no different.
Its also like the Liverpool goal at Tottenham (as funny as you may find it), there is no reason why the ref can't stop the game and say, 'sorry, it was a goal'. This is what VAR is for, righting obvious wrongs and not piddling around for ages on lines. Its also funny how the referee blew for full-tile (I think) at brighton a few seasons back, but was still able to bring the players back for a Man U penalty!
I don't blame the ref either. Inexperienced or not it’s just a mistake. It’s VAR that's the issue. Anyway, I'm happy with Europa. It’s still European competition.