will it be a good decision if I removed the articles that don't rank?
not a good idea. They might not rank because the competition is fierce for the keyword / topic those articles cover, and at some point - after years, and after your domain's authority grows bigger - they might start ranking.
What you can do for now is build a few internal links (2-3) to those pages (that don't rank) from pages that do rank, but make sure that the internal links have the main keyword (of the pages that don't rank yet) as anchor text, and that the internal links come from articles that are relevant to the articles that don't rank.
If that's not possible, build some quality links (5-10) to each one of those articles (if you can afford it and it's worth it, obviously) over 1-2 months and see if at least they break into top 100. If they don't even break into top 100 then probably that they're targeting very tough keywords, although you should know better what kind of keywords you've targeted and how easy / hard they are....
Also, it could also be the niche. Some niches (guns, porn, pharma, gambling, etc) are just not accessible to mere mortals like you and me, so if your site is in one of these niches (or other tougher niches like banking, pregnancy, luxury resorts, SEO, web hosting, etc.) you can say good-bye to ever ranking without many 1000s of $$$ per month and without a strong domain, no matter how good your content is...
If your niche is approachable, I would also take a look at SEO factors like site structure, site speed, technical SEO (easily crawlable URLs, non-restrictive robots.txt / .htaccess files, live and working internal links, etc) and fix them accordingly as sometimes poorly formatted / broken sites do get soft penalties like this (not ranking despite of not being deindexed either).
But anyway, throw a few internal links with exact match anchors at those pages and see if they at least get into top 100 in about 1-2 weeks. If they don't, throw some quality external links for a month or 2 and see if that moves the needle...
If these 2 link building strategies don't work you're either targeting tough keywords, the niche is too competitive / regulated by google, or you're having issues with your site (including the content) that makes it hard for the idiot googlebot to figure out where to rank you
