I'm sorry but if you can't at least admit this, there's nothing we can gain from this conversation.
2- Did you watch the video? It's clear that his idea of governing is "conquer[ing] power but also exercise it in a revolutionary manner!". If he's not talking about his understanding of democracy, then I don't know what he's talking about. In any case he's explicitly supporting using "revolution" and "conflictualization of everything" to "conquer power" and "exercise it in a revolutionary manner". If that doesn't scare you, I don't know what will.
3- I'm sorry but I won't bother read stuff from LFI, they so often fail to be relevant, throwing nice-sounding ideas around, they don't care if they work, everything sounds so easy, "pay people more", "more money to education", "more money to health care", "lower retirement age", "more democracy", "more power to the people". All of that we can't have because of [some target group]. [some target group] are conspiring against "the people". Can't you see it's just a "nice" and empty ideology? It has a name: demagogy and populism.
4- I'm not surprised some powerful people support a demagogue. While it'll be bad for most people, opportunists can really profit from such a regime.
5- This quote is just there to remind you that LFI have it very easy, they point at "authoritarian" Macron, while they burn mannequins of him, threaten to behead him like Louis XVI, put his head on footballs, etc. They can do all that borderline stuff with no consequences. They just support these massive hate campaigns. Which is maybe ok? Because it's free-speech? I don't know, it sounds like hate speech to me. But in any case they have it soooooo easy, compared to any country with actual authoritarian leaders. It's easy being InSoUmIs in a free country. They are just highly privileged people, pretending to be oppressed and revolting against an imaginary "dictatorship". Can't you see that? It's so obvious to me.
Let me add a 6th point. The way Mélenchon blames Ukraine, apologizes Putin, his completely ridiculous stance just before the war started, saying that Russia would never invade and that it was all a big plot from US/NATO as always... He was soooooo wrong on that one, it's just embarrassing. He's wrong on so many things, but he just angrily moves forward, finding new enemies to denounce, new polemics to surf on, never acknowledging his spectacularly failed predictions. I simply can't understand for the life of me how can educated and honest people fall for such an obvious fraud.