E2E encryption is not the same as MITM. You’re not adding anything useful to the conversation.

E2E encryption is not vulnerable to MITM. E2E encryption is vulnerable only to how many keys there are and who has access to them.

If someone except the communicating parties has access to the keys, it’s not E2E encrypted anymore though. At least according to this definition:

https://en.wikipedia.org/wiki/End-to-end_encryption

SO if google still has access in an E2E system, but you didnt know, is it still E2E?

What if google told you they also have a key? Does that change the above answer to the question?