OK maybe not every single one, but most. Capitalism doesn't provide the support structure to prevent people taking their own lives because there's no other way out. A close relative of mine just attempted to unalive themselves because of their fucked up work situation (abusive boss) and inability to find work that they could do with their chronic conditions and disabilities. Many others have done the same, successfully. Conservatives and liberals alike whinge that communism or socialism kills people – most of the people who have taken their own lives are deaths from capitalism and we need to say that.
EDIT: this does not say 'only capitalism causes suicide', please take care to read. I do not argue in bad faith with fascists.