The Transfer fee talk is annoying. It's perfectly fine to feel the need to bring up the price, just not now. He's only played 5 matches with United thus far. At the end of the day, we all know he will be judged by that transfer fee by not just opposition fans and media, but also United fans. Why are United fans joining in and mentioning the price nonstop? Media are going to use that fee because of the story. Opposition fans are going to use that fee because football fandom is tribal in nature so anything they can use to stick it to United, they will use. To them, being objective doesn't matter. But a United fan? Objectively you know it's dumb to mention it at this point in time, yet it happens all the time.
Go ahead and label him disappointing, there is nothing wrong with that. I don't even think there is anything wrong with thinking he was never worth that amount if you're taking his entire contract worth of future appearances into account. However, anybody can be either worth or not worth that huge fee if you're only taking 5 matches into account. It's such a small sample to judge.
I'll start to worry, 2 months from now.