CETA specifically? I'm not sure I'm hesitant to say details because I might be wrong. This stuff is very complicated, even in america TPP divides both democrats and republicans. Alot of it is decided behind closed doors, so transparency is an issue. Even if I could tell you something specifically wrong with it, or the worst thing wrong with it, I might be getting that information from someone who is misinformed, or worse yet they may be talking about something they already changed.
I could even turn this into an ML vs trot argument, however there are plenty of far right wingers against deals like NAFTA CETA and TPP. And they have spread tons of nonsense about it over the years. Its become more of a symbol against internationalism, an excuse as to why the stock market can be at record highs but the poor and middle class are still getting screwed and why "trickle down" is working, but its trickling down somewhere else. They cant blame the good honest white christian capitalists for this, so it must "the other" its the foreigners fault for stealing all the money and the leftists are covering it up, because America is so charitable to everyone that were just being taken advantage of, because we're so nice. So much so, that Trump regularly lambastes them, although he says he will re-negotiate because ya know "he makes the best deals, nobody makes better deals than him, and America is getting a bad deal the worst deal, and whatever fuck you" lol.
https://www.jacobinmag.com/2016/10/f...gium-wallonia/
No question, the far-right has its own reasons for opposing "free trade", but that in itself is no reason to support it. Certainly, a free trade deal of the sort that opens up more opportunities for ISDS has worrisome implications for the future of the most modest environmental regulations.
The kind of "free trade" the left seeks is not the kind liberals seek. We want to see goods and services provided on a global scale for the needs of a global community, not the enrichment of capital unencumbered even by legal restrictions of bourgeois states for environmental and other purposes.
"I'm a pessimist because of intelligence, but an optimist because of will." - Antonio Gramsci
"If he did advocate revolutionary change, such advocacy could not, of course, receive constitutional protection, since it would be by definition anti-constitutional."
- J.A. MacGuigan in Roach v. Canada, 1994