While the sites owners are struggling to get into search results, the readers want to see only useful search results. If you are irritated by some resource in the search, it can be easily excluded permanently.
This is autotranslated version of this post.
uBlacklist extension for Chrome and Firefox, which helps to exclud unwanted sites from Google search.
After installing the extension you'll notice the button "Block this site". After clicking on it, the site is added to the block list and will no longer appear in the search results.
Also sites can be added manually in the extension settings. You can use a mask to block not just domains, but individual pages.
The list can be synchronized between browsers on multiple computers. To do this, enable the sync with Google Drive.