Accidentally deleting your mailing list was probably bad but I think the rest was good. You might miss some opportunities with LinkedIn but fuck those snakes, you can probably get the job you want by showing your work
If you're in an artistic line of work. In mine which is a rather commercial/human relations kind of job with deliverables that can't be put on a public portfolio for show, LinkedIn is absolutely vital to keep networks and contacts and to be on the radar of potential employers/business partners. Do I like it? I fucking despise it. But there's no replacement for it.