It's not surprising that some people have struggles with resettling, this stuff's hard and some people have more advantages and/or will get more breaks than others. But there's no point in wallowing in self-pity or blaming other forces. If you're going to do that, you may as well go home and at least be where you are familiar. I'm coming from the United States where I feel confident I'm inured to the particular problems you speak of here. Of course most jobs go to the networkers. Employers get better employees more easily that way. Of course people will let you down. They have their own lives to lead, their own struggles to manage; how much energy do you expect them to spend on your life and struggles?
So what do you do about it? Your network, no matter how paltry, is better than you think. Spread the word around, talk to as many people as you can. Friends, relatives, neighbors. Everyone knows someone. Contact leaders in your industry to ask for informational (not job) interviews. Find out about what it takes to break in, ask them if they know of anyone else you can talk to. Remember to properly thank them afterwards (an email is fine). They will be more generous than you (or me, anyway) might expect. If you have a skill, that skill has an association. Join it and get active. Go to seminars, hang around afterward to talk to the presenters, attend the mixers.
Want to respond to a published job ad? Don't send your resume to Human Resources, they'll probably get 500 resumes and there's no way they're looking at every one. It doesn't matter how perfect your resume is if they don't see it. Do a little research, learn about the company. And then send your resume to your future boss with a cover letter that shows you spent some time learning about the job and the company--he'll only get a couple, he'll look at it, and if he sends it to Human Resources, it'll go to the top of the pile because it came from him and not you. Six carefully choreographed applications are worth more than 600 pro-forma job-ad responses.
Good luck to everyone.