Welcome to the board, heafea!
There is alot of truth to what you say. Although this was unfair to both sexes, it was extremely unfair to sisters. One thing that bothered me was to see ordinary blokes who were nothing to look at marry beautiful sisters from congregations far away because they had the advantage due to the brother/sister ratio that exists in the organization.
My 21 year old beautiful pioneer friend settled for a 35 year-old pioneer elder and we all thought she'd made a good catch. In truth, he was the one who'd been lucky. I'll bet she'll never see it that way either.
I've seen the craziest pairings due to the written and unwritten policies that exist in the witness arena. When I was but 20, my dad tried to marry me off to an older brother in our hall. The guy had to be at least 40 years old and he lacked social skills. Still, he had alot of money and because he frequently lent to the friends he was considered a good 'catch'. I declined and sought my fortune elsewhere. In retrospect, I probably should've married the old guy rather than the hothead I eventually did marry. But I thought the young one was a spiritual man who spent all of his free time in field service. And he continued to do so--beating me early enough in the morning or late the night before so he could still have time to rise early and go out in service.
I think the ones who have it the worst though, are those who are divorced but not scripturally free to marry. MIght as well have leprosy because no one will look at ya and in my case at least, very few want to associate with you either. I was in this living hell/limbo for almost 5 years while I waited for evidence of infidelity. What a freaking waste of precious years in which I turned away nice 'worldly' men even though no jw man would consider me in my state.