Is LinkedIn a User Friendly Professional Platform?

LinkedIn looks like a platform in which you have to compete to win others. 

If a job pops up and you are lucky to be online at the exact moment it is being published by one of your connections - you will be able to apply and leave your contact details. But if you are busy for one second talking to someone or a call comes in ..... at the moment you want to find the job ad it will probably be gone by then. Unless someone in your network likes the post, leaves a comment or shares the ad ...; you will not be able to read the post again, track the recruiter who created the post neither will you be able to find the name of the company to apply on their website. 

If LinkedIn is a corporate social media platform.....; why is it so difficult to navigate inside? Why do people never find the right audience for their posts? 

Is LinkedIn a platform to win more connections? Is the person with the highest number of direct connections and followers going to win a price? 

What is really LinkedIn all about????????????