Because he can pretty much choose any club in the world and we haven't won a trophy since 2017 and the league title for a decade
That is true, but if you look at it from a more positive side we also have:
- OGS who he is very close to (OGS' job wasn't remotely safe when we tried to sign him the January he went to Dortmund) and they are in regular contact as per reports in Norwegian media
- OGS is also close with his father (they both played together for the NT and spoke a lot together regarding signing Haaland for Molde and develop him from there)
- An existing relationship with Raiola, even if it means silently accepting his public outbursts
- The money to pay a release clause
- The budget to match most if not all clubs on salary
- The biggest club in his dream league (born in England and for most Norwegians see the Premier League as the pinnacle of league football)
- A young and highly talented squad which will now include his best buddy and main assister in Dortmund
A big reason for the lack of noise around Haaland to United this summer is probably because OGS and the club knows his situation very well directly and with Cavani signing for one more season the immediate need for a top striker isn't that pressuring. Personally I still see City as the biggest rivals to his signature so won't have high hopes for signing him next summer unless City end up going for Kane this summer.