The experience you have will vary depending on which accounts your server has noticed.
I did join in last year and (from what my server could see) it was mostly people talking about positive everyday things, it was very fun and constructive.
Obviously you had a different experience, but the Join In tag isn't specifically intended for tales of woe.
A way to avoid this variation is to follow the group rather than hashtag, as the group will be identical on any server.