While some parts of Europe got slightly warmer during the Middle Ages, only to then cool down significantly during the little ice age. Anyway all of those changes were slow, over the course of centuries, and not like now a quick, aggressive increase in length and intensity that's certainly due to the highly foreseeable results of freeing millions of years worth of stored carbon in the atmosphere in just a few decades

Also most models indicate that the AMOC collapsing would mostly make winters way more rigid, and only have a small impact on summers.

I don't know where you're from but where I live we've been having weather that's >30C for almost a month now. The other day we had 30C at 23:00. The sea is a pot of stock, the water is 30C and the glaciers on the Alps are literally flowing off the mountains. This is serious and I highly doubt that this will improve unless we build massive CCS (which we shouldn't). We had a great summer weather and we basically traded it for a tropical one