AE CC 2018 ridiculously slow

Seriously, what is wrong with AE CC 2018!?

I'm on an absolute beast of a workstation, a HP Z840 with 128 GB RAM, dual Titan X:s and so forth, but I can't even preview a simple text animation!

It takes forever to preview, and playback tops out at about 10 fps... I've got nothing in the timeline but animated text, no other graphics, no video, nothing.

And it's not only the preview that's messed up, the entire interface is laggy, when I move the cursor in the timeline sometimes it takes like a second for it to catch up.

Everything I try to do, import a file, keyframe an object, add an effect to something, and so on, takes forever.

I've done restarts, checked nvidia drivers, purged all memory and disk cache, cleaned database an cache, everything you could ever think of, but it's still painfully slow.

I never had these problems in cc 2017, it ran like a dream.

I'm at a point where it is virtually imposible to work, and it's making me a bit frustrated to say the least.

Don't tell me I have to downgrade to be able to work, that would just be, well, silly.

Why on earth would anybody release a version this unstable?