A tire that only lasts a couple of laps is a shit tyre, not a better one.
That would be the case if the goal was to reduce total race time, but that is not actually the case. The FIA asks for tyres with a degradation profile, such that one-stop and two-stop strategies are roughly equally appealing to the teams. Pirelli does not deliver on this, since the one-stop is clearly superior on most track at the moment. The fact that low-deg tyres are faster overall, does not change anything in regards to the fact that they aren't meeting their customer's demands.
That would be the case if the goal was to reduce total race time, but that is not actually the case. The FIA asks for tyres with a degradation profile, such that one-stop and two-stop strategies are roughly equally appealing to the teams. Pirelli does not deliver on this, since the one-stop is clearly superior on most track at the moment. The fact that low-deg tyres are faster overall, does not change anything in regards to the fact that they aren't meeting their customer's demands.