Thank you for posting @digitalwellnesscoach 
Yes, I agree about the useful aspects. What I find most useful is the ‘rolodex’ function, the ease with which you can find interesting connections and great people (which there many of on LinkedIn). And - depending on your line of work - I guess it can be useful to find jobs too.
With regards to having your resume online, I think there are better ways. This is on my TODO list, but I want to have my up-to-date resume on a personal website, where I also might keep a blog. The advantage is that your personal data is no longer mined and monetized by LinkedIn from then on. Also, if you publish articles, then you can first publish on your blog and then republish to LI (which is better from a copyright and licensing perspective).
On your LI profile you then keep a nice description of yourself, and add a single Job entry with a “Read more at my personal site + full CV” reference. Then you might use the LI profile more selectively, like e.g. your Volunteer activities, Skill endorsements and Recommendations, and only follow Groups you are really reading (rather than a “This is who I am” collection).
BTW I found that Skill endorsements do not work for me, as your old skills will have most recommendations, and are hence featured to your network. This while you are most interested in advertising your new skills. Therefore on my profile I deleted my entire set, and replaced with more human emotions and characteristics (did it for fun and pleasure, but really like the idea now). I also took a sort of a casual title, for that reason.
When you’re carefully curated your connections, then your feed is kinda okay in the information it presents. I find interesting articles and stuff in there. But you should resist the urge to interact with it, like and comment and such, and can also ignore it altogether. Turn off all notifications, of course, if you value mindfulness 
LinkedIn contains a METRIC TON of Deception Patterns! Always has. Have reported some in the past:
But there’s also downgraded experience when you don’t use their app (and even more downgraded when also using Firefox). Support gets ever more unreachable. UI full of bugs which are never fixed. Etcetera.