I watched Tove Lo open for Coldplay. She's "big". She's "famous". She's a "successful artist". She has four songs with over 250,000,000 plays on Spotify. She's got it.
And yet, at the Coldplay concert, no one cared. Half the seats were empty for her set. Very few people were singing along. She might as well have been someone just getting their start because, most of the people were there to see Coldplay.
Don't get too discouraged if no one is singing along and half the seats are empty. We can always get better, sure. But, you just might not be in front of your audience.