Thy Will Be Done!

Some people think that closing a prayer with “but Lord, not my will but Your will be done” is a sign of no faith.
 
To tell you the truth, I’m not really sure what that means. Jesus prayed, “Father, if you are willing, take this cup from me; yet not my will, but yours be done.” (Luke22:42)

 
Was Jesus low in faith at this point in His earthly life? If you know the answer to this question, please help me.
 
Yes, I pray saying, “Abba Father, take this from me but not my will, but yours be done.”
 
While thinking about this question, worship God with me with this beautiful song:
 
Here is the lyric: 
https://www.youtube.com/watch?v=PAmh3yvmzXs
 
I’m so confused
I know I heard you loud and clear
So I’ll follow through
Somehow I ended up here
I don’t wanna think
I may never understand
That my broken heart is a part of your plan
When I try to pray
All I got is hurt
And these four words
 
Thy will be done
Thy will be done
Thy will be done
 
I know you’re good
But this don’t feel good right now
And I know you think
Of things I could never think about
 
It’s hard to count it all joy
Distracted by the noise
Just trying to make sense of all your promises
Sometimes I gotta stop
Remember that you’re God
And I am not
 
So thy will be done
Thy will be done
Thy will be done
Like a child on my knees all that comes to me
I know you see me
I know you hear me, Lord, ///