@ahoppin :-
Yah, peebee's right. The Ungoogled_Chromium-portable is currently up to v101, and it runs fine for me in Barry's old Quirky64 April 7.0.1.....which is "only" on glibc 2.20.
You must remember, Chromium is the experimental test-bed for Chrome. In the "test-bed", Chromium is built with, and expects to find on your system, the very newest of everything.
Google, when they build Chrome - and to a large extent, this goes for most of the 'clone' builders (like Vivaldi, Opera, SRWare's Iron, Flashpeak's Slimjet, etc) - they take the newest 'stable' build, perform a bunch more tests on it to check everything out, then re-compile the browser source code against an older build-environment. When they're finally happy with it, they add their proprietary bits'n'bobs, package it up, and the next version of Chrome hits the shelves.
The older build-environment is more or less self-explanatory. It ensures the browser can be used by the largest number of people, running the widest number of different systems.....and in so doing, helps to keep the user figures/market share as high as possible. Google may be a lot of things, but one thing they are not is stupid.
Mike. 