Here's the content of that post:

And don't say I can migrate to some other instance. That only helps when the old instance remains operational.

Can I easily transfer my previous posts (Toots, they call them) to another instance? NO.

And this is just one complaint. I've shared other reasons in my reply to this post here on SN;

Mastodon saw record number of downloads after Musk’s Twitter takeover #87933

I sincerely apologies to those who I've persuaded to join the Fediverse / Mastodon / Pleroma. I wanted to see something used for social media other than Twitter (which had suspended my account numerous times) and I though Mastodon was much better.

Sue me.