Don’t you think that the US military strength has helped maintained the free world firstly against fascism, since then against Soviet communism, and currently against Russian imperialism?
In the first case, its undeniable that Europe would have remained under fascist domination without the deployment of US men and resources in 1944-45.
In the second, its undeniable that the US maintained and won a huge arms race and military deterrent against the USSR, and that the Soviets did not invade western Europe etc. In fact the USSR was so impoverished by the effort and their own misgovernment that the USSR collapsed on its own.
In the third case, the US could do better but most of the other members of NATO are not even trying to pull their weight so hey ho. However, if my freedom depended on either the US or Putin, I’d go for the US.