Maybe, just maybe, you don't have the skills they're looking for. More importantly, you don't know how to sell them. But that only applies if you actually have skills.
If you're unskilled, the jobs don't pay well, but they're pretty much available to anyone who can show up and be basically pleasant. If you have no reliable transportation, then your chances don't look good. If you piss off everybody on the job site, you're even worse off. With no transportation, many bosses will see if another worker could pick you up if thinks you'll be useful. Piss everyone off, he knows you're nothing but trouble.
You know what skills you can get that practically guarantee you a job wherever you go? Welding. The vast majority of places you can go in industrialized and developing nations always need welders, because to be a truly competent welder requires a rather vast array of skills that a lot of people would not cultivate, even if given the chances. It takes a pretty fair knowledge of material science, as well as an understanding of basic physics somewhere into college level, as well as having enough strength and stamina to manipulate the materials you work with for more than 8 hours a day, usually 14 to 18 on a lot of jobs. Basically, it takes being a little higher than average intelligence, with the discipline to stick out learning a bit of engineering, and more math, and the physical endurance to stand up to using your muscles all day in hot and very noisy environment. Not for the stupid or lazy! Both of those get a lot of people unemployed, but not a lot of welders, because stupid and lazy people won't get the skills to become welders.
There's plenty of others that can get you jobs too, primarily in construction. A competent and fast roofer, or drywaller, are both people who can get a job basically just by showing up on a residential construction site. Bring your own tools, and even if that site is somehow filled (they almost never are), they can tell you who needs you. If you don't have tools, you might still get a shot. Prove you're capable, and you can borrow some tools until you can buy your own.
If all you're looking for is office jobs, of course you have trouble getting hired. Often 20 people looking to fill 1 position. That means 19 don't get hired. Then you have 100 more office slots in the place, each with another 20 applicants. 100 get hired, 9900 do not. Simple math.