Yeah your just missing two key facts here. One, yeah europe is still getting warmer, AMOC hasn’t collapsed. Two, the conditions for maintaining a convective current are significantly easier than starting one. So if AMOC collapses and Greenland ice stops melting, there’s no guarantee AMOC will restart. And even if it does, it could take centuries.



As someone doing my PhD on this topic, there aren’t even any theories really competing with dark matter, and dark matter fits what we see in the universe quite well.
That being said, we’re still quite in the dark on what dark matter is, but we’re pretty sure its there.