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Really sorry to hear the new site is still struggling, Nicolas. In some quick indexing tests, it certainly appears that your blog posts are being indexed, and I'm seeing them in the search results for the specific post titles. [See screenshot attached] It's possible this may have picked up in the 10 days since you posted this. I'm assuming you submitted your site's xml sitemap to the correct www version of your Google Search Console? What does the sitemaps report indicate as far as the number of pages indexed compared the number submitted? Certainly one of the tradeoffs of a site tool like Squarespace is that you have far less control of the code to implement technical SEO, but it shouldn't be so problematic that you lose rankings completely. If you're interested, I'd be happy to share a short Skype chat to try to narrow down the issues. You can send me a private message through my account here at Moz. Paul

The total number of links is almost always going to be higher than the RDs.  This is because the domain is counted once (hence "unique") whereas there are often many links coming from that domain.  Consider your own site - your own site will provide links (these are called internal links) and you will have hundreds or thousands of links from your own site.  If you have a homepage link on the menu bar, that is creating one link on each page of your site. So the number of links is not very helpful to look at alone.  It may be useful to look at the ratio of total links to RDs, but that's a separate issue.  The more useful metric is RDs.  If I were you, I would pursue links from different sites so that you can build a portfolio of more RDs. It's not unusual to have 10-15 RDs for a new domain.  After 1 month I would be surprised, but seeing that after a few months would be normal.