It's a great idea to be cleaning up old questions that should never be answered, thank you!
I think we should be careful about being too aggressive with this, though. The query picked up a number of quite recently closed questions, including several that are still new enough to be described as "on hold" instead of "closed". That language is deliberate, to encourage the askers to think that there is a way back for their question by editing.
Many of the questions still look unsalvageable to me despite that, but in the particular case of What Capital Gains are owed for a Non-resident owning stock in US C corporation when it is acquired?, I think deleting it was wrong so I've undeleted it for now. We can always delete it again if necessary.
In particular, it's only two days old, had been edited since being closed, and has now gathered two reopen votes. Personally I also think it should be reopened but I'm not sure if I should cast a binding vote to that effect. Either way, I think for now it should still be visible on the site.
I'd suggest that in general we don't delete any "on hold" questions unless they are obviously unsalvageable, as per the definition of "very low quality".
For older questions, the "Stack Exchange roomba" should clean up a lot automatically. For the closed questions being targeted here, anything with a score of 0 or less will be deleted after 9 days of being closed or last edited. A lot of the ones you identified had score 1, so one option would have been to nudge them to be cleaned up organically with a downvote.
Personally I think it would be great if the community as a whole would get involved in keeping the site clean, either by downvoting or voting-to-delete these old questions. Posts like yours are a great way to identify things they should be looking at.
If we have more eyes reviewing old stuff we might perhaps catch the odd one that is worthy of some further attention. For the ones that did manage to get an upvote in the past, someone must have thought them worthwhile.
The more people we have getting involved in running the site, the more smoothly it should run, with the elected mods as "human exception handlers" for the less routine cases.