Well I believe the government had to clamp down on opposition because they actually are in league with the imperialist side of the US and want a coup and overthrow democracy in Venezuela. I don't think they falsified the results, until I see actual evidence, and not just claims of having evidence by the lying US.
It's similar to Iran: The guardian council was established to prevent coup attempts by e.g. the CIA. Election interference creates a legacy of problems. Many countries in the world can't have a free democracy because the US can bring such a huge influence to bear. The USA deserve to be hated by many people of the earth. The US experienced that kind of interference the first time in 2016.
But my point is that if your country is under siege by a hostile foreign power you have to hold fast and prevent the take over at any cost. This is where crackdowns and oppression become less black and white and the use of force and violence is an imperative.
The Venezuelan government has been remarkably calm and measured though. They didn't even arrest Juan Guaidó who clearly is a US puppet.
Oh thanks! It seems a lot of the arguments agree with what I was speculating. I find it suspicious that you hear so little about this idea.
Of course none of that would work with the abysmal current state of news media.