Yes I can’t stand the 3D animated anime. In fact I wish it had a different name altogether. I was super disappointed when I saw the new Altered Carbon anime was 3D
It really depends on the quality in my opinion - the bottom line is you can't replace quality and effort when making animation. 2d or 3d can both be ugly or beautiful.
For example Aggretsuko is a 2d anime but the animation is so lifeless and boring (entire scenes are just walk cycles), whereas Beastars is 3d but at the same time very expressive and much more visually interesting, dynamic and experimental.
Personally I find bad 3-D more offputting than bad 2D.
Bad 2D fades to the background of my mind's eye, allowing me to focus on the story or characters, while bad 3D manages to capture and distract my attention.
There's a whole zoo of 3D styles. From the semi-realistic look complete with SSS-shaders for skin that more resembles videogame cutscenes than your average anime (kingsglaive movie[0]) over the plasticy half-way look that has realistic lighting on flat-colored materials and outlines (e.g. altered carbon or the blame movie[1]) to productions that more closely emulate the common manga/anime style, sometimes even mixing 2D and 3D the same scene[2]
Attack on Titan heavily uses CGI for action sequences and dynamic camera movement. It's a fairly common technique that often goes unnoticed, but it's done very frequently in this show due to the crazy ziplining.
I believe when people are talking about 3D anime they mostly refer to the characters being done in 3D or it dominating the show in some other way. Props, cars, indoor environments, mecha and so on have often been done in CG for quite some time now. Of course context matters, a mecha fan may care more whether they're CG or handdrawn. If anything AoT is a bad example here because it makes it obvious rather than going unnoticed.
How did you find Promare? There were a few shots that I found a little jarring but I thought they did a good job of liberally making the frames more sparse.