I don't see any instance where your fiancee "verbally attacked" you. What you are reporting is not accurate.

You are not seeing it but your behavior is aggravating a lot of this - e.g.
(1) You are at *her* house but do not greet her when she comes in. Instead, you went to hide.

(2) You physically pushed her when your partner is a big boy and can defend himself IF he chooses to. This was not your place to lay your hands on her.

(3) You keep searching for posts online to 'prove' to your partner that she hates you.

Etc.

How would you feel if these behaviors were reversed? What if SHE did not say 'hi' to you when she came to your place and went to hide in another room instead? What if SHE lay hands on you to physically push you, and so on. There needs to be more maturity on your and your partner's side, you aren't little kids anymore. You also need to live your life and stop speculating on what others may or may not do in order to 'prove' how bad they are.