I'm annoyed that it is necessary though, as the official institution who is tasked with preserving recorded works is failing to do their job.

I would encourage you to contact the LoC to express your dismay and your desire to see them improve:

https://www.loc.gov/contact/

You will want to address your correspondence to Carla Hayden, the current Librarian of the LoC.

I expect it's better to contact your member of Congress to request a budget increase for the LoC. According to Wikipedia, the LoC has only a $6-$8 million/year budget for digitization.

That is also a necessary effort, and I appreciate you pointing it out. My apologies for not enumerating in my above comment.

I'm not. I think the LoC is a single point of failure for curation. No single institution is going to preserve everything, so having multiple institutions, public and private, is far better than relying on a single public institution to get things right.