>

Not sure how it could be implemented, but maybe you just shouldn't be able to choose where to file a complaint if it's not solely affecting that jurisdiction? Like, if the complaint is concerning a national matter, it should be arbitrarily assigned to a random federal court.
It’s a problem.  Anyone who wants to block a new policy can bring any number of suits to any number of judges — you only have to find one judge who agrees with you.  There’s no sport in the world in which 1-30 constitutes a winning season. >

Would an example of this be the student loan forgiveness Biden signed which was ultimately blocked by a single federal judge? >

Yes, absolutely.