However Merkel in germany has even less power over the states, same in Austria and I guess even less for switzerlands president with its famous independent cantons and the type of president there.In the US the president's powers are illusionary. States have their own powers over the sanitary mesures (I wish the DR provinces had the same - why should Pedernales take the same measures as Santo Domingo?).
Did you noticed how the governor and the city mayor of New York were quarreling about the scope of COVID lockup an Trupmp could do nothing? Or how he sent the military to the protesters and the generals said no. He can flight Corona virus on Twitter... until they censor him.
Do not blame Trump - that's the system that is beyond repair.
all of those leaders managed to unite their governors - who in Germany are some from the other parties in a not so nice political climate- and got like 90% or so approved and originally 80% support from their inhabitants.
Trump can travell ban without asking anyone, get industry to produce things and and. None of the other presidents can do that. Taking about facts. He has limits compared to Putin but has much mote power then the other mentioned countries and coukd have at least done the same as Danilo who seems to have about the same powers.