It is quite common for businesses to fail within the first five years.
Around 20% businesses fail during the first 2 years and 50% within the first 5 years lol
The numbers must be more skewed when it comes to Developing countries(like Nigeria)

Businesses in poor countries tend to face greater challenges and obstacles than those in developed countries. This includes factors such as a lack of access to capital, limited infrastructure, corruption, and a lack of skilled workers. As a result, businesses in poor countries often have a lower success rate than those in developed countries.

Starting a successful biz in Nigeria isn't going to be easy and can only be done by locals imo