To each their own. That's a common saying I believe, in many ways, needs to be accepted a little more in today's society. Politics, religion, lifestyle. For many of us in the social media community and anyone with a brain, it's no one's bees-wax what social media site you should choose or don't choose. If you're not feelin' it, you're not feelin' it.
LinkedIn, as with any site has its difficulties. Accept them, resolve them and keep your presence, is my advice.