I've discussed how I think the quality has decline elsewhere in the thread, but in short, they flip-flop so as to be on the "correct" side of the conversation too often instead of admitting fault, their UK/EU commentary has been of such a low quality I could find it in a tabloid newspaper if I wanted, and their general Anglo-centric view of the world is not valuable to me explicitly for the reason you describe; I'm British, I don't need more of a pro-UK narrative.
I put the Jacobin explicitly because I wanted to make it clear that I'm open to the whole political spectrum. I've read some good articles on there, as well as bad. I'm happy to be convinced out of subscribing to it. I've had a lot of people say it's a rag, but not explain how. Is it because it's poor journalism, or is it because it's socialist?
And no, it's not that I'm looking for validation of my own opinions. That's why I've put it out to a forum and not just picked the one most appealing to me.