May I ask why folks hate on LinkedIn so much? Almost every job I’ve ever gotten was in some way through that platform. There’s ridiculous noise there too, but it’s super powerful to network and find jobs. I think it’s very valuable as an individual to just have a page, never publicly post, show your direct projects credentials and accomplishments, and not use it like social media.
Personally, I've had LinkedIn since it began and had a complete and updated profile. The only benefit I received from it was work anniversaries from people I barely know. I've had the same job for 15 years. I'm not actively looking for a new job. I received zero value from LinkedIn. Your milage may vary depending on your use cases.