The revisionism with regard to him is problematic. The player he is now wasn't the player he came here performing as. Neither were of the required standard, but the initial run, he served multiple purposes and did aid the team and teammates.
Agree with this to some extent. If we list the things he was probably tasked with achieving, in order of priority:
1. Defend from the front with intelligent pressing and high work rate.
2. Provide a target man for longer balls forward.
3. Hold up the ball to create chances for other forwards.
4. Add aerial threat from set pieces.
5. Score easy chances and tap-ins.
(Notably not being asked to:
A. Score a significant number of goals.
B. Score 'individual' goals.
C. Engage in intricate link-up or provide creative assists.)
That's just off the top of my head, and could I'm sure be debated, but I think it clearly captures ETG's general expectations.
For his first month or so, I think you can argue he did a decent job of 1 and 2 and was possibly unlucky not to get a couple of goals to fulfil 4. However I think even from the start he has clearly failed to achieve 3 or 5. He has never seemed capable of holding up the ball, and generally conceded possession easily. And he has missed some really unforgivable chances that any player on the pitch for United would be expected to score, let alone a striker.
In the last month or so, I think he is basically failing across the board. He still works hard defensively but doesn't actually seem capable of winning the ball back or pressing effectively. He doesn't receive the ball well as a target man, and he still can't retain it when holding up. He's not looking like an aerial threat. He's not scoring easy chances.
To his credit, he remains a consummate professional and clearly positive presence in the dressing room, which many players would not be in his situation and in such poor form. But he's not achieving even his original fairly narrow brief, and I'd imagine either Sabitzer or McTominay is capable of doing that job better given the chance. So I'm not sure he deserves another minute on the pitch.