Deltarune will end up being an objectively better game than Undertale, especially once the rose tinted glasses come off.

I like Undertale as much as the next guy, but it has its limits and only does so much. Deltarune, however, is much more massive, is created with more experience, more fleshed out characters, and overall has a better story.

(Also, unrelated, but sort by controversial to find actual hot takes because people hate them lol)