LinkedIn has gotten worse and worse for me. As he says, the most basic features are poorly executed and I have such a distaste to use it whenever I get any notification from them since I know they screwed something up with the execution.
A fun anecdote - I had a recruiter for LinkedIn reach out to me via Quora whereas almost every other recruiter does it via LinkedIn. Not even eating their own dog food.
Historically I've been a fan of LinkedIn. But one example of something that's started to bother lately are the endorsements. Most of my endorsements come from people who don't even know what the words mean. If they're going to offer this fine-grained endorsements then they should be meaningful, but they're not because they just spam out prompts to get users to endorse each other. This creates almost infinite inflation in the real value of endorsements, which of course doesn't matter one whit to LinkedIn because they own the printing press, rather it is just a cheap engagement driver for them.