I'm glad to see them protesting for sure, and there's a lot of screwy stuff in the net zero agenda, obviously (e.g. culling cattle because "cows cause climate change" 😖).
But my impression is that some of what they're protesting is a proposed drop in subsidies and restrictions on some nasty pesticide and fertilizer use (I think!! I'm not positive and haven't looked too deeply into it).
In the US, dropping agricultural subsidies would be painful in the short term but would lead to all kinds of net wins. In Europe, I think there are smaller farms on average and I can see the argument that if you're going to subsidize everything from healthcare to education, then farming should be on the list as well.