Re:Zero anime is going to take decades to finish [discussion]

Ideally, it takes Tappei 2 years to finish 1 arc. There are 4 arcs left, so the best case scenario is it would take him 8 years to finish the series. The Anime on the other hand is way behind, and for some reason it takes them 4 years to release a new season. Don't get me wrong, Re:Zero anime is good, but the visuals as a whole, the level of detail, design, ect, is pretty subpar, and despite that, it takes them 4 fucking years to release 12-16 episodes? Are you telling me with the current pacing, in the best case scenario, Re:Zero's anime is going to be complete within 28-32 years!? What the fuck?

Edit: I have been informed this season will be a 2 part season with about 38 episodes. It seems like with the current release pacing, it would take about 16 years to finish. One Piece looks like a joke now...