There are instructions for practically every kind of environment, and many users here have succesfully installed DokuWiki on Ubuntu.
You used an installation package which was not made by DokuWiki but by Ubuntu; the documentation you mentioned above explicitly warns against using that package. Also, it says to check the date of the package but you didn't mention the result of that check. You have not even given a reasonable account of what you did when trying to install DokuWiki on Ubuntu.
Take your complaint to Ubuntu or use one of the other methods mentioned in the DokuWiki documentation.
Watch your language. This is not the tone to speak to people who volunteer their time and effort, mostly in their own free time.
I now close this thread. You are free to start a new one, giving a reasonable account of how you tried to install DokuWiki, keeping your voice to a standard customary among people willing to help you.