Has anyone applied for a patent for utility model? Is it easy to write your own application? Will it be difficult to pass?

To tell the truth, I applied for no less than 800 patents a year. Look at the amount and skills of writing. The problem you mentioned will naturally disappear after a long time. The protection scope of the utility model is relatively small, of course, it is within the scope of the claims anyway. You can buy it if you have money! But it depends on applicability, which should be reflected by market value. In other words, ultimately it depends on the market.