Is there ANY evidence they weren't self inflicted? Can you actually point to this evidence or just talk about something as if it were fact without actually making a case for it? Google pictures of bruises from falls, then consider someone falling hard against the corner of a bath tub. Then ask yourself how easily those bruises could be from exactly what Hardy says happened. If you're unwilling to even consider the possibilities and ask questions about what happened, then your opinion is worthless as it wasn't developed with even the smallest bit of critical thinking.
Nobody is saying that Hardy didn't do anything. Nobody here knows. People are simply pointing out that there are serious doubts about the whole situation.