You should switch kernels soon. As 6.10 has reached EOL, it will likely disappear from the repo’s without much ceremony. Again, I suggest 6.6 (LTS) or 6.12 (LTS) [when it’s released].
Updates can fail to complete for many reasons;
If you look at the Update Announcement thread (before performing an update) you will see a list near the top of what is to be updated.
A rule of thumb is that if you see anything major will be updated; like, anything related to your DE, the X server (X11) or Wayland, for example; always perform that update from outside of the GUI;
Reboot; and once you’re at the SDDM login screen, open a TTY and perform the update there, without loading the GUI. This can help avoid many potential issues. In fact, it’s a safer method to use, generally.
A handy tutorial if an update fails to complete due to your computer crashing:
Please see my comments my post (below) concerning Baloo.
Regarding stability, I’d suggest paying particular attention to system maintenance generally; perhaps the Manjaro Wiki might help fill in a few gaps in knowledge if needed.
We can’t monitor your system for you, but if you have other issues you can always start a new support thread.
Cheers.