Judo is the competition-version of Ju-Jutsu. Ju-do means the soft way. Soft because all the nasty and very effective stuff has been left aside to make competition possibe (compete more than once in a lifetime). If you need a combat training go for jiu-jitsu, the modern ju-jutsu. It's the most complete system I know.
Judo is a great sport.
By the way: There is no "bad" system. Their's only a lot of weak fighthers.
Si vis pacem - para bellum
If you want peace - prepare for war