Hi @zakyr,
Welcome here to the forum. Well done with your Chatgpt consultation! Unfortunately, I think you are right here. Looks like Eagle Syndrome with severe internal jugular outflow obstruction to me, which i had myself.
You could also render your CT scans to a 3D model for more clarifyed view. Most people use free 3D Slicer software for that.
When it comes to treatments, I can only give you the advise to see a doctor specialized in JUGULAR Eagle-Syndrome, like Dr. Hepworth, to whom I came from Germany to get the right treatments - instead of having incomplete surgery attempts by lunatic doctors that only shorten the styloids to “normal length” and without special care for the compressed IJVs.
There is also Dr. Constantino and a few others that could be taken into consideration, but I only have personal experience with a good outcome with Dr. Hepworth that’s why I highly recommend him especially for Jugular Eagle-Syndrome. Further steps might be a IJV Ultrasound to determine the bloodflow velocities (s. Dr. Hepworth’s protocol for CTV - #4 by TheDude) an probability an MRI to see maybe pressure signs and vascular structures of head and neck.
I’m hoping you can find the best doctor for your condition. Traveling might be worth it.