Filibustering gives disproportionate leverage to minorities in the Senate. These, in turn, lead to bills not passing or often not even getting past subcommittees. Are there any other instances of this in other democratic countries?
Northern Ireland, while not a sovereign country but a part of the UK, has a different way to ensure some minority can have their say. Under the terms of the Good Friday Agreement, certain decisions (including any bill where the petition of concern was invoked) can only be passed by a so-called cross-community vote. That is, you need a majority from both Unionist and Nationalist parties.
Many countries have this kind of a mechanism, where a minority can slow down and delay the process so much, that the legislation doesn't get passed. Such countries include UK, Canada, Australia, France, Italy, and others.
Wikipedia describes some of these examples at the link below: