I mean, they aren't the worst canned collards. Which isn't saying much. Hell, I'd even go as far as to say they're the best canned collards, which still isn't saying much.
Collards just don't can well. You can't even home can them and expect anything worth a damn. Most greens are like that tbh. It's one of those things where you're better off just not having them if you can't get them fresh. I think the only green I've found tolerable canned is spinach, and that still took a shit ton of vinegar to tolerate.
For real, fresh collards are the food of the gods. Braised with a little apple cider vinegar, a bit of bacon grease, and your choice of stock. Takes a couple of hours to get exactly right, but if you want more chew, you can go less time. More if your want the texture closer to canned.