Would Chavez be able to seize power without CIA fuckery or would it have still happened just slower?
Chavez's seizure of power was already rather slow and gradual, even more so by South American standards, where coups usually occur rapidly and violently, so I doubt that he would have managed to become a dictator without such an antagonistic attitude by the US. Venezuela actually was, until the Perez Jimenez dictatorship, the longest lasting democracy in South America. Being the country of Bolívar, Venezuela's spirit is very liberal and democratic, and they had solid institutions. However, the instability generated by the Perez-Jimenismo and the aforementioned antagonistic attitude on the US' part produced a populist, anti-American sentiment that was easily exploitable by demagogues like Chavez and could be used to justify authoritarianism.
One must not overlook how much anti-Americanism is a core element of Latin American leftism. Socialist regimes in the continent often fail precisely because they have no clear, coherent, pragmatical economic framework. It's primarily an ideology of resentment, fear, aversion or even hatred of the US, specifically of the country's foreign policy, which is seen as too interventionistic. Therefore, leftist governments in Latin America establish their policy around doing the opposite of what the US does, regardless of the results so achieved, because the ideology is sustained by propaganda, not reality. Whenever the US actively tries to destabilize those regimes in such a blunt way, it actually strengthens their propaganda, keeping the ideology alive even when the operation is successful. US Politicians and their voters need to understand that what they call "Latin American socialism" isn't an economic system like that of the Russians, it isn't even an unified model within itself (many would argue that Chavez and Maduro don't belong in the same category as Allende, making your original question nonsensical), it's an aesthetics. The unfortunate truth is that aesthetics usually triumph over reason.
