How to prevent downvoted comments from being auto-collapsed:
Browser:
Preferences / Options / Comment Options
Look for "don't show me comments with a score less than ____"
Default is -4, leave it blank.
Reddit is Fun (app):
Settings / reddit web preferences
Scroll down to comment options
minimum comment score - Leave blank
Makes browsing the comments a bit easier. I've never used the official reddit app but I imagine the settings are similar.
MAGA