It's no surprise that LinkedIn's codebase is a mess if you try to use the website, it's a complete nightmare. Say I see an interesting post, I click on the person who wrote it to learn more about them, then I press back to go back to the post and continue reading it - now the feed refreshed and I've lost the post.
Say I want to scroll back through messages I've received, I do that, the entire webpage starts lagging and takes 10-15 seconds to register inputs.
Why do I get 30 fake notifications? They are literally not real, made up rubbish to force interactions from people - it's disingenuous. The recommendation algorithm is also completely terrible.