Why is the conversion from vertices to curve creating issues with the geometry?

Question

I created a structure by converting the vertices to a curve. However, the object looks like this:

How come there are issues with the geometry?

Here is the file:

Does this answer your question? Unable to create edge between two vertices (imported SVG) You do not say what your issues are, I guess unconnected corners? Curve control points cannot branch, they have only two connections maximum: one to the previous point, one to the next point. Exceptions are start and end point, they have only one connection. — Gordon Brinkmann, Mar 15 '24 at 15:05
Hmm, maybe I don't understand it. But nothing changes if I would make it a mesh first. I also tried doing it without the second layer, but I also don't understand why certain parts are smaller and others are bigger. I want the radius to be equal. When the curve is going 'around the corner' it is smaller. — DPlayground, Mar 15 '24 at 15:41
https://blender.stackexchange.com/questions/200083 https://blender.stackexchange.com/questions/56079 https://blender.stackexchange.com/questions/56079 https://blender.stackexchange.com/questions/259501 https://blender.stackexchange.com/questions/66353 — vklidu, Mar 15 '24 at 16:49
Since you are user from 2023 and you asked already 10 Q ... you probably noticed you have a privilege to mark answer of your Q as "accepted" (solved) ... so please use this feature to keep this site organised https://blender.stackexchange.com/tour Thank you — vklidu, Mar 15 '24 at 16:52