I see how it is - I see how it is means you’re finally seeing through someone’

I see how it is means you’re finally seeing through someone’s fake act and you’re not going to be tricked again.

You said you wanted my job, but now you’re telling everyone I’m a loser.

You said you were my best friend, but now you’re with my crush.

You said you were cool with my plans, but now you’re messing them up.