Those prices are a bit off:
Interstate Battery- $285 (Easy enough job to do yourself)
Spark Plugs- Cost me $390 to have my mechanic install a set of colder plugs
New Transmission- I was quoted $5,900 to replace the transmission, parts & labor (Ford ended up covering it under warranty)
Not sure about the engine but I doubt it's $20K
These vehicles have their share of issues but, as has been mentioned, people don't tend to talk about their good experiences as much they do bad experiences. My 2020 has 45K on it and I've only had a few minor problems, for example: AWD module, front half-shaft speed sensor, transfer case actuator seal. The transmission was fine until I had it serviced by an incompotent dealership.