There are only two arguments I can come up with. One is that, if existence, in and of itself, is an undeniable objective good, regardless of our opinion at any given moment (i.e. regardless of whether or not we do, indeed, deny the good of existence), then hell would be a choice to reject goodness, love, etc, in favor of cold pride and selfishness. It would be the adamant rejection of God, still having a preference to continue to exist, perhaps, but to exist without Him at all costs.
The other point I’d make is that we don’t know all the ins and outs of the after life-we don’t know much about it at all, in fact. But we do believe it’s been revealed that God is infinitely just and fair and merciful-and that justice will be done in such a way that all will be satisfied. A 13th century British visionary named Julian of Norwich, a nun, I believe, whose revelations the Church accepts as valid and who was living during the Plague, carrying a great burden for the eternal fate of so many who were dying, was given this simple, powerful, assurance by God: **“All shall be well, and all shall be well, and all manner of things shall be well.” **And while my own knowledge and understanding are quite limited, I have absolute faith that statement will prove itself to be true.