Wait, what?
Tax cuts mean that the government gets less money, thus not leaving more money for hospitals or for infrastructure. Also, the US doesn't even have a federal healthcare system. He's increased spending on the military by around 34% since he's been in office. Infrastructure, especially the roads system that is left over from the 60s [that hasn't been properly updated], isn't in great shape when you look at it from a nationwide perspective.
The American people aren't happy with him, why should the world be?