@FabianRöling What you're trying to do is different from most panoramas. Most panoramas rotate the camera about a central point of the camera or lens, ideally the "point of perspective", also called the "no parallax point" (and often somewhat wrongly called the "nodal point"). The idea is that when rotating around this special point, no matter which way you aim the camera, you won't get any parallax shift of near and far objects with respect to each other.

The parallax effect is demonstrated by holding your thumb out at arm's length, and closing one eye. Look at anything beyond your thumb. Now open the eye and close the other one. If you were still looking at the same background point, your thumb jumped to the side. This is because you were taking an "image" with 2 different "cameras" (each eye), each from a different position. This is atypical for most panos, but this is exactly what's happening in your setup.

Check out this question, How can I stitch a panorama correctly if I moved the camera along the horizontal axis?, and specifically, Inkista's answer, which recommends using mosaic mode in Hugin.

@scottbb I saw that tutorial before, but it references lots of buttons and tabs that I simply do not have in Hugin. Also, it involves manually setting control points, which is pretty much infeasible for 152 frames.

And preferably I wouldn't want to only have one layer be selected, like in the graffiti example there, where it's a flat wall, but instead everything that's visible out of the window. But maybe that's actually impossible, I don't know.