The EU negotiates as a bloc. If the trade deal includes $750 billion in energy purchases and $600 billion in investments, those commitments came from the EU's negotiating mandate, not from separate members acting on their own.
Maybe some of the EU member states don't like how the "union" operates. In that case, they should pull a Brexit. We already saw it happen once.
I'm not sure where you're getting your information, but this is a quote from the European Commission itself:
> The political agreement of 27 July 2025 is not legally binding. Beyond taking the immediate actions committed, the EU and the US will further negotiate, in line with their relevant internal procedures, to fully implement the political agreement.
You might consider updating your mistaken prior beliefs.
Edit: I see another comment made the same point. I'll have to presume that after you've been presented with this new information, you'll realize that you are in fact very wrong.
Maybe some of the EU member states don't like how the "union" operates. In that case, they should pull a Brexit. We already saw it happen once.