Absolutely the worst thing about Unreal Engine 1(.5ish) turning its nose up at my 3d modelling is that I am so much of an amateur it's, like, I took a simple cuboid and went What If Sloped Face A Bit? and it just. Fucking Won't. Display it right.
I hate 3D modelling because I don't know what I'm doing and it makes it so laborious to get the simplest things done and then I know the results are The Simplest Thing Possible After An Example Cube and the engine goes "nah...I think you can get fucked" and I have no idea what, if anything, can be done to fix it and I cannot find any useful information by searching because firstly, there never was any; secondly, most of what there was has bit-rotted away; and thirdly, 99% of it was by Unreal Tournament mappers who were mostly snotty little teenaged bastards desperate to sneer at each other that they were n00bs. And they confidently asserted that the problem I've having Simply Doesn't Happen.