GNUTLS version preventing LibreOffice from loading

I've run into the exact same issue as apt-get wants an older GNUTLS version to be defined when I attempt to run LibreOffice (/usr/lib/libreoffice/program/soffice.bin: relocation error: /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4: symbol gnutls_srp_allocate_client_credentials version GNUTLS_3_4 not defined in file libgnutls.so.30 with link time reference)...

...except a ton of extra libgnutls duplicates are apparently being generated by snap:

/snap/core/6673/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core/6673/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/core/6818/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core/6818/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/core/6964/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core/6964/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/core18/782/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core18/782/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/core18/941/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core18/941/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/core18/970/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/core18/970/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/gnome-3-26-1604/74/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-26-1604/74/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/gnome-3-26-1604/78/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-26-1604/78/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/gnome-3-26-1604/82/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-26-1604/82/usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
/snap/gnome-3-28-1804/31/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-28-1804/31/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/gnome-3-28-1804/36/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-28-1804/36/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/gnome-3-28-1804/40/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/gnome-3-28-1804/40/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/libreoffice/116/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/libreoffice/116/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/libreoffice/117/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/libreoffice/117/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/snap/libreoffice/118/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/snap/libreoffice/118/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/usr/lib/i386-linux-gnu/libgnutls.so.30
/usr/lib/i386-linux-gnu/libgnutls.so.30.14.10
/usr/lib/x86_64-linux-gnu/libgnutls.so.30
/usr/lib/x86_64-linux-gnu/libgnutls.so.30.14.10
/usr/local/lib/libgnutls.so.30

I feel like following the solution in the original post will address the symptoms of the issue but not the root; should I look at uninstalling and reinstalling snap first before I try to do any relinking? Or is something deeper going on here?

Such problems are usually caused by libraries in /usr/local/lib.

Try to move the problematic library out the way and retry to launch LibreOffice:

sudo mv /usr/local/lib/libgnutls.so.30 ~/
soffice

Also note that libraries in /snap/ are isolated and usable only by the corresponding snapped application.