Without going into full detail on the procedure I'm imagining, such an outcome would bar consideration of equivalent legislation for several years and require a supermajority at several stages of the legislative process to override.
Basically, it can oppose new legislations but can't retract old laws.
It can't be. At least not in a legislature. Defining what is the same question is itself a political question. And past legislatures being able to bind future ones is just a futurecasting veto. A single crap election could poison the pool on a raft of issues for generations.
The proper way to do this is through constitutional amendments. The fact that these are too difficult to do, currently, seems to be the bug.
Anyone who’s ever been unable to dismiss a nag and forced to defer via "Ask me later" knows the feeling of powerlessness and disenfranchisement deliberately planted by those making UX decisions. .. or the EU constitutional framework.