Is it really that hard to apply without atleast a year of clinical experience here in us?

I am a BSN,RN from Philippines with a 4 years experience in the emergency room. I just got here in Illinois last September and started working on October under my employer/petitioner in a skilled nursing facility/rehabilitation center. I have tried to apply in several hospitals but only got few responses and was declined for a job offer since I have only been working here in the US for a couple of months. Is it really that hard to apply without having at least a year of nursing experience here in US? What is the best thing to do if I don't really want to stay longer working in a nursing home? Any advice?

I don't understand "employer/petitioner". If another employer did want to hire you, would they be required to take extra steps and make extra commitments? That could be a big hurdle, in itself.

Someone looking to leave a new job after just a few months might not seem like an attractive employee, either.

I'm assuming employer/petitioner means the nursing home organization you currently work for is sponsoring your work visa and ability to stay/remain employed in the U.S.? That means a new employer would have to take on the contract/visa requirments in order to keep you here. Given many (though certainly not all) hospitals have no particularly difficulty in attracting nurses who are already citizens or legal permanent residents they likely don't want to take on the hassle of hiring someone on a visa.

Furthermore hospitals might be wary as, if your current organization is sponsoring you, that is a significant commitment, yet you seem eager to break it after only a few months. It may raise concerns that if they did take you on you would jump to a new job as soon as something "better" opened up.