Having chosen ESGB as my Base airport in 1970, I can see that you have set the runway length at 1630m which is too short for both the Caravelle and DC9'ers!
Historically, this is not right since the runway 04/22 length was 1850m already in 1943! 1966 it was stretched to 1930m to be better prepared for the "Jet Age". The first Caravelle's came in 1960 followed by SAS DC-9's which made Gothenburg to an important airport internationally.
I know, this game cannot be 100% historically accurate, but there should be at least the right conditions to create an airline with the same a/c. As it looks now, my future lies with the Fokker F-28 for the Jet Age and it feels a bit "limited" for my expansion plans.
Thinking of going bankrupt and starting over at a bigger airport now..
Viking Air International