You really must take some responsibility. I research the heck out of my future cars and sometimes I still get it wrong but that’s on me. My present car hasn’t got ACC and I thought regular CC would be OK. I hate it but I have got used to it. If someone needs overhead parking instrumentation and 360° cameras then I would question their ability to drive. How have you managed without this feature previously as it is a relatively new thing? The same goes for the blind spot warning. Only my present car has ever had that and I got along just fine without it for several decades.
If you absolutely need electric seats then you should make sure that any cat has got them before signing up for it. All I can say is that 3 years passes very quickly and you will soon be looking for a new car!