I agree that all governments lie but we have seen that the US does not even adhere to the law.
This is not true. It reflects a spin (indoctrination rather than factual).
When we speak of the law you have to specify what law. The issue comes in when one decides the governing authority.
The US did not violate US law as because of prior federal drug indictments, a lack of diplomatic recognition, and domestic legal rules that allow courts to try captured defendants.
Did the US violate international law? Perhaps. The UN prohibits using military forces on foreign soil without permission.
BUT Canada has violated international law several times (Canada violated the Arms Trade Treaty in 2021, the Basel Convention in 2014, and Article 43 of the IHR in 2013-2016).
The argument goes to what laws are superior. It gets questionable because international law is voluntary.
If Canada has a law that conflicts with a UN law, which is followed?
Is Canada really sovereign? That is the ultimate question and the reason many of us would prefer withdrawal from the UN.
Given the state of many nations, attitudes of people sharing your opinion (just one readon, a minor one), I would prefer the US withdraw from the UN and NATO.
Let the US concentrate on consolation power within its borders, building up offensive and defensive capabilities. Let the EU fall. Then, and only then (prior to true consolidation by the conquering nation), act offensively for defensive purposes. Withdraw and repeat.
There is a historical precedent for using weak nations as buffers. This was the value of Judea for the neo-Persians, the neo-Bablyonians, the Ptolemaic kingdom and Seleucid Empire. It is what the EU has been doing with Ukraine.
The economic pain would be temporary (for the US).