Please change the blacklist search function back. Having posts that contain blacklisted tags just not show up in the search is not a good solution. Some posts have a tag I've blacklisted, but I still like to view it. Other times I'm looking specifically for a specific post that has a blacklisted tag, and now I can't find it with out altering my settings back and forth each time.
The original system was much better, this solves zero problems and creates a bunch more.

I do dislike that searches don't tell you how many posts were excluded, unlike the main page, which tells you how many are hidden. Like you said, that makes looking for certain posts (or tagging) more difficult.

You can do this with the userscript now: hypnohub.net/index.php?page=forum&s=view&id=105958

Enabling the new blacklist replacer makes blacklisted posts show up during searches and allows for more granular blocking.

All this did was remove the blacklist for me entirely. Posts aren't showing as blacklisted at all on the main page.

The replaced system works on a per-line basis, you'll want to put one tag per line when moving from the old blacklist or else it'll only block posts that match ALL of your blacklisted tags at the same time.

This way you can blacklist specific combinations.

I tried to do that and all that happens is that the site instantly dumps it into one giant line again. Do I need the plugin to do that?

Edit: it still keeps that even with the plugin
Installed it on Chrome and it lets me do the line by line but it doesn't work beyond that and just has the binary on or off and no ability to check for blacklisted content in searches either

You need to enable the 'Replace Blacklist' option down at the bottom of the page.