For me it was the masks. The masks were my tipping point.
At some point at the beginning of the pandemic they said that the disease was totally not airborne and that masks were useless. I remember vividly president Macron (a person that I respected before that) very serious in TV explaining to all the citizens of the republic that we should not buy nor wear masks. That we should clean our doorknobs and vegetables, wash our hands, and avoid touching our face. If we did that we would be safe, no need of masks.
Just two weeks later, he appeared again on TV announcing that wearing masks was now mandatory. That it was the most important thing to do. Without any correction on the previous statement. Without any explanation of whether the previous statement was wrong due to ignorance or intentionally (to save masks for health personnel). Not only he was a liar "for our own good", he acted as if people hadn't even a two-week memory! An utmost lack of respect.
I found it extremely offensive that a democratically elected president treats the citizens who elected him as little children, and not as adults. I don't believe any of the stupid conspiracy theories, but I have more sympathy for the conspiracists that follow these theories (I am compassionate to them) than for the evil lying politicians.