No one's preventing anyone from building a better solution and making it available to consumers. Not a monopoly
Are any of these what you meant? https://www.merriam-webster.com/dictionary/monopoly
None of those seem to apply to Tesla's charging stations to me. Could you explain more about what you're trying to say here?
https://www.wordnik.com/words/monopolize
Tesla's network of fast charging stations are owned by the manufacturer of the car, and they exclude others from using their network.