Lindelof -Martinez last match together was the 3-0 win against Leicester where they both played really well even though Casemiro was missing. The match you remember was last year, about four months ago and is the only match we lost with them as CB pair, all other 8 we have won.
Total summary Martinez-Lindelof:
8 wins
1 loss
5 clean sheets
19-7 goal diff
Includes 2-3 easy games in EL but they have looked good together imo.
And about being turned like butter, we just saw a total defensive collapse including Martinez being dribbled on to his arse, so a little weird timing to bring on those four months old memories.
United 3 - 0 Leicester - PL - good
Forest 0 - 3 United - EFL Cup - good / poor opposition
Fulham 1 - 2 United - PL - meh - typically passive and weak for the goal but also made some vital blocks and interceptions.
Villa 3 - 1 United - PL - horrendous
Real Sociedad 0 - United 1 - Europa League - good
United 3 - 0 Sheriff - Europa League - good / poor opposition
United 1 - 0 - Omonoia - Europa League - poor / poor opposition
Everton 1 - 2 United - PL - good / poor opposition
Omonoia 2 - United 3 - Europa League poor / poor opposition
I did the work for you. This is what it means to look 'good' with Martinez and getting clean sheets i.e mostly against poor opposition teams that sat back. The reason why I remember a game from 4 months ago is because he's simply not started that many with Martinez and it was literally only their fourth game back. I'm also giving benefit of the doubt with a few of those 'good' comments because good to me, would mean he was fairly dominant, which wasn't really the case. Thus, I'm rating his performances as a third/fourth choice. That's not also taking into account that Martinez would have been the dominant one on
and off the ball for most of those games.
Lindelof getting turned like butter or turning his back is a regular occurence over 5 years here. It happened to Martinez on Sunday and it'll happen again but that is the exception to the rule thus far this season; his high and low level far exceeds that of the Swede. It's a low bar to say but whilst it's nice to have a somewhat capable stand in, by no means does he look 'good' with Martinez, in what is an extremely small sample size and against low level quality.
This is why context matters.
It gives some people with an agenda to push narratives like some players have been performing good (in largely reduced roles) or why some people in this very thread justify insane comments like 'we're not really different defensively when you compare the stats to last year, so Lindelof/Maguire probably would have performed the same with Casemiro'.