Renormalization is on relatively good footing these days. Nobody claims that it's a "final theory", but the argument that "the same theory may work with differe

Renormalization is on relatively good footing these days. Nobody claims that it's a "final theory", but the argument that "the same theory may work with different values for the constants depending on what energy scale you cut off at" is totally legitimate. The remaining confusion, such as "why the hell do we have to do it though", is really QFT's fault for being perturbative (and likely just incomplete).