I presented more than enough data to prove my point and looking through Wikipedia archives are a long painful task.
You posted a list of airlines that served Cork at some stage.
Your claim was.
Cork has proven it has the market for other airlines, it has proved this ~2007. The loss of these routes would be completely down to a lack of advertising.
Most of the services you listed failed not through the lack of adverting but through the lack of a sustainable market.
It is one thing to launch a route with all the advertising in the world.
It is another to sustain it.
The landscape of the Irish aviation scene is littered with failed startups and tried routes.
The core business outside of Dublin is in the main UK access and holiday flights.
There are niche operations beyond this but not many.