Citywing sells tickets for flights opb Vanair. Vanair has the flights operated by Titan/Sprint on its behalf. It is not that now Citywing would contract Titan/Sprint and sell tickets for flights opb Vanair. It is not different from a tour operator selling me a seat only ticket for a flight operated by Thomson that for operational reasons has its flights operated by Titan. I don't see a problem here, really.
The problem is, as I understand it, the Citywing part as they act like a tour operator selling seats only (i.e. a ticket seller) without being regulated as such.
Which has led me to defend Vanair - that may or may not have had an operational issue last week, but are really not different from any other airline in Single European Sky and should, as a properly licenced EU airline, not be treated differently in public opinion just because they are Czech and not, say, Irish or French.