I think there are probably several hundred HN readers who would be happy to tackle those problems. Boring is probably not the issue, but obscure is, assuming these problems exist. If they're difficult to discover that the problem exists, that's a challenge. Further, if the problems exist but are highly unique in each case, there may be a reason it's solved in a one-off way by Excel or scripts rather than a scalable product. The use of Excel isn't inherently ripe for disruption. There are plenty of problems to be solved that just can't be solved profitably. It would be no better than solving a problem that someone has but is unwilling to pay for.