Why are you even a communist if you think every setback and issue a communist country has is proof of the US's undying might? Seriously, why are you even here if you clearly think the US is eternal and undefeatable and every communist movement so fragile that any assault on them is just proof of their revolutionary movement collapsing? Communism clearly doesn't work in your worldview, so why the fuck are you even here?

If there are circumstances under which decapitation strikes work, and those circumstances are capable of being set up by the Trump white house, then decapitation strikes cannot be dismissed as unworkable because of systemic factors.

A distinction that doesn't matter. All tools that work have conditions under which they work and under which they do not.

Guns can work, provided they are loaded, the safety is off, and the gun is functional. In other words, guns work.

I believe that to be an incorrect framing. The issue is not the strength of the state. Decapitation strikes have most famously failed against relatively weakly organised states. ISIS was not a very well organised system with robust infrastructure, biweekly assassination of their leadership did not change much in that regard. If not having a strong state was what mattered, then ISIS would have collapsed as soon as Baghdadi died, and all the various successor organisations would likewise have collapsed rather than now running Syria.
What matters is the incentive structures and the motivations of potential successors.
Removing Lincoln (Even if his assassination could not really be called a decapitation strike, he is nevertheless instructive) changed the trajectory of reconstruction and therefore American history, it did so not because the US was a particularly weak state, but because of who was put in charge and who was removed.

Venezuela has flaws, but it has a strong socialist tradition and believers in the Bolivaran revolution in various positions of local government. It has systems that were deliberately set up to act independently of a potential reactionary government. The idea that Venezuela is uniquely unable to withstand the US is just not a premise I accept. The leadership is choosing to go along with an American agenda. It may either be doing so because leaders of the government don't really believe in the socialist project, it may be doing so out of fear of more kidnappings or other American reprisals. I can't read thoughts.

Edit: Changed the wording to make it clear that you I don't think you are incorrect on a factual basis, I just disagree.