You’re talking about small business owners getting corporate welfare for decades, slowly losing to the bigger capitalists, which is the inevitable result of capitalism.
Talking about Germany: We're talking about farmers getting squeezed out by supermarkets and other traders and by subsidies geared towards increasing farm size. It has been decades-long state policy to shaft small farmers and benefit large ones.
That exact subsidy regime is what they're protesting.
I agree that the competition issue is a problem, but most of them will support neoliberalism: deregulation, the race to the bottom.
They're protesting that EU environmental and animal welfare regulations are costing them too much, yes. But they aren't fundamentally opposed to those regulations, they simply don't want to be the ones stuck with the bill. They can't afford those bills.
And the animal sector needs to end. The feed crop farmers can switch to food crops.
Bullshit. Intensive animal farming needs to end, meat needs to become more expensive (and also btw butcher's wages need to be increased), protein imports need to end (i.e. South American soy), but Europe has plenty of agricultural land to produce meat sustainably. There's plenty of landscapes we can't preserve without animal agriculture as European bisons aren't really a thing, any more, neither are wolves which would be necessary to keep the bisons in check should they be re-introduced on a larger scale and we refuse to hunt them.
If you don't want to eat meat that's your choice and I support it, but don't expect that bullshit statistics (like counting water raining down on meadows as "water use") impress anyone not invested in your moral system. Least of all ecologists.