during most of the song the F chord is played in three down strums of all strings.
you can easily hear the strumming pattern in the song which is on all streaming services or here:
https://www.youtube.com/watch?v=1SQypiixGYU
[Intro]
C A F C
[Verse One]
C Am F C
You see someone else when you look at me
C Am F C
You see what I've always tried to train myself to be
C Am F C
You see dinner tables and picture frames and everything in between
C Am F C
You see a medicated mind gripping tight to belief
[Chorus]
G F C
And I hope I never have to see this waiting room again
G
With patients coughing beside me,
F C
while i stare up at fluorescents
G F C
Praying that no one I know will walk in
C F
And I'll have to explain why I'm here
C F G
But I don't even know why I'm here
[Instrumental]
C Am F C
[Verse Two]
C Am F C
My mouth sewn shut, for you I tear open the seams
C Am F C
Every time they ask what's wrong with me
C Am F C
If I knew, I'd tell you, but trust me I don't
C Am F C
And you can diagnose me, but that won't make me cope
[Chorus]
G F C
And I hope I never have to see this office again
G F C
Spitting out my demons to somebody I just met
G F C
She's taking notes just to remember my name
G F C
Cause the only one who listens is the person I pay
G F C
And I hope I never have to see this waiting room again... x3
[Outro]
C Am F C
Lest I forget what it's done to my head
C Am F C
Let the medication fix me instead