What someone could have done is different from what they will do. A different perspective, even from the same person, is often very useful.

Hel could have made her afterlife appealing, and created a massive Vampire church that has hordes of reasonably pleasant some of the time thinking undead that worship her, and with going to her domain being seen as the reward and becoming undead (and thus qualifying for Clerichood) the tip you give to the doorman.

Unfortunately, Hel appears to be a sadist and extremely begrudging of everything and everyone (possibly scaled to account for normal situations). She would rather watch everyone else suffer a thousand times over before she would try another person's route, especially the "sounds kinda Good" route.