Is this a trick question or does it not make any sense?

In an overwatch FB group, I posted: "FACT: Mercy loves Genji... In my opinion."

I thought that this was equivalent to: "In my opinion, Mercy loves Genji" because it is a fact that I have an opinion.

However, somebody said the following, "You said

FACT: Than you stated something and then said "in my opinion"

Which makes it your opinion not a fact

You than went on to to tell me that it is a fact that you have an opinion and yeah thats true.

But you would have needed to say

FACT: I have an opinion... Mercy loves Genji.

Which would have validated your claim. However you didnt phrase it that way which means it is your opinion and not a fact. Its really that simple. The way you phrase something determines how the context sounds."

Is she correct?

Basically, I wanted to say my opinion but also wanted to throw people off with the word "fact".