A big problem with the Github issue tracker is that there are no priorities. Ideally what you want is someone to do the triage of new reports, prioritise them and then have the main team see them. Sorting by priority then gives an idea of outstanding work (or probably sorting by milestone and then by priority). Bug tracking in general in volunteer communities is terrible. There will be languishing items, duplicates,…
What choice to you have besides getting somebody else to do the triage? I think the problem is that users do not consider this a fun activity to help their open source project.
I was going to say; if Jeremy has trouble wading through hundreds of issues, he should level up as an OS developer and start asking for help, him becoming the project leader, the underlings distributing the workload of going through issues, escalating the actually important ones to the boss.
This isn't exclusive to OS development either, it's what happens and should happen in real life with management and whatnot. Of course, overdoing it causes five levels of management between Joe Developer and The Boss in the corporate world.
tl;dr: delegate