I swear the amount of times I wasn't sure if I actually accepted or sent a connection request is way too high. The endorsements are begging to be rigged, and the website is absolutely dismal in terms of social functionality - it pales in comparison to almost every other social media platform.
The only reason it's still popular is because it doesn't need to be any better to do the one thing it does best, which is to be a search engine for recruiters.
That all being said, I maintain an active linkedin profile and I use it regularly.