You're the only other person I've heard of with so many issues! My 2017 C-Max Energi has given me a lot of grief also. After leasing it for two years the seat heater gave out. Dealership spent a month replacing stuff until they just replaced the whole front seat. I was leasing it at this point so this was covered by warranty. This was minor compared to the next issue.
A couple of years later my C-Max would overheat and I would have to pull over to let it cool down. Context: My husband and I would often take ~2000 mi (round trip) road trips a couple of times a year to visit family. The C-Max always handled it very well until the engine overheating issue started. We brought it to the dealer and they ended up replacing the whole transmission. Car only had 78,000 miles or so on it. The dealership had the car for six months because the transmissions were backordered from Ford. Silver lining: I had gotten a warranty when I purchased the car after the lease ended. So I didn't have to pay for the repairs.
So yeah, now I have a love-hate relationship with my C-Max. I feel your pain lol.
Also C-Min(imum) is great lolol.
