At demand calculation time, you will have 2 "booking slots" out of 3,375 possibilities.
That means 0.059%, basically a bit ore than one half of one-tenth of a percent.
Even with the highest rating, maybe your "power" at booking time grows tenfold, so it's like having 20 booking slots out of 3,375 possibilities. Which means a bit more tahn one-half of a percent of all passenger demand on demand calculation day, divided up between your two flights.
There is a lot of demand between Romania and Israel. Only that there are usualy a lot of flight OTP-TLV. But I think there is not so much demand between BOJ (south of Bulgaria) and Israel. Also, you should take into consideration that the ground network of BOJ include IST and OTP and if you do not have enough transfer passengers then you will not get your flights full.
ORS isn't everything. It's only a part of the whole. Ground networks might give you a few seats, but the major thing you need are connections going through to other destinations. As Rubio said, if you only have a small percentage of the available connections, and since there is a finite amount of passengers going directly from TLV to BOJ, you're only going to get a percentage of those. Try setting up flights that connect to that one to other destinations in Europe and west Asia.