To get us to stop sharing our bad experiences with women I think some posters intentionally delete posts with lots of replies.

I might be wrong but I've seen it in this forum several times (eg u/inelegant88 recent post chastising MGTOW for not sacrificing ourselves on the altar of pussy).

Doing this around a major us holiday also to me suggests strategy.

Totally natural to feel demotivated after putting in effort and I think their goal is to discourage effort.

One way around this is to write posts and replies in a note taking app (eg Evernote, Google keep, OneNote, hell even notepad if you're on Windows) first then copy pasta into reddit.