First off, hurray, the site survived. All my complaints will be more about X2 issues, since themes are pretty clearly temporary solutions to make the site usable with your choice of flashbang or poor contrast as a side effect.

remains and so the site is still alive
-One big thing I have noticed is that things are all just really aggressive with obnoxious autoscroll spam for no reason. Scroll down too far on threadmarks and it starts trying to snap back to it, try typing a comment, it snaps to the 'new posts, reload?' text. Probably more yet to be found.
-Another annoying user experience downgrade is that threadmarks are no longer in a scrollable list and instead need you to repeatedly scroll down, load a small handful more (counted, it's only 8 at a time) and repeat, obnoxiously autoscrolling only some of the time all the while and if you mistap/click because of that you gotta scroll all the way up and back down. Gonna be basically unusable for larger threads as is.
-Overall UI text element sizes feel off, with a lot of wasted space and a fair few redundant components, like the big fat list of threadmarks, right above the threadmark menus. Then there is the massive block that has the thread creation date, right below the tags, which have the thread creation date with them anyways, taking up less space, could probably fold in anything worth keeping from that block into the text with the tags if need be. Topbar too if there is no way to unsticky it. Footer is hilariously massive on mobile, on desktop it's fine. There are also redundant social media share things on every page that appear to be the exact same as the stuff in the footer (link function outputs the same)
Uhh, I found out it's name.. it's called blackend.. ? that style was the best I think..
Blackend Green, my beloved, I pray for your return.