And considering that we are a small team, we're doing wellCibaman is totally along the right lines and your perception is miles away from the reality.
Premier League Corner Stats
15/16 - 133 goals from 4117 corners - Goal per corner conversion rate - 3.23%
14/15 - 120 goals from 4062 corners - Goal per corner conversion rate - 2.95%
13/14 - 118 goals from 4093 corners - Goal per corner conversion rate - 2.88%
The OPTA definition of a "goal from a corner" was IIRC was one within 3 or 4 touches of the kick being taken so the one we got at the weekend definitely counts as a goal from a corner. The percentages above do not differentiate between 1st touch i.e. directly headed in or 3 or 4 touches. So, goals from corners are relatively rare events and supporters from ALL teams see repeated failure.
So, which team has the best record for scoring goals from corners? Well, cumulatively City scored the most in the 3 seasons 13/14 - 15/16 with 30 goals from 813 corners.
City - 30 Goals
West Brom - 28 Goals
Liverpool - 24 Goals
Chelsea - 23 Goals and no one else 20 or more.
Now, City won more corners over the last 3 seasons than anyone else so there is an expectation we should score more. Very importantly tho our conversion rate is only 2nd to West Brom who by some distance have been the most efficent. Their goal conversion rate over the 3 seasons was 5.13% and ours is 3.69%. Rather than us being shit we have actually been very good relative to everyone else. We are scoring a goal on average every 27 corners. Over the 3 years the 2 worst teams are Stoke and United who scored every 63 and 50 corners respectively.