You are either competent to be a captain and deal with the inexperience of a fully qualified but new FO or you are not.
This is the same for every airline, except many airlines have old shabby aircraft and poor training departments.
EK has neither, and has no more tricky destinations than BA or any other legacy airline who all cope with cadets.
If you are not competent to do the job of handling junior FOs then resign but just stop whining about it as if it is somehow something special to have to actually mentor some junior guys occasionally.
You were spoiled for years, now you are not. Get over it.