I am looking for a word to describe something that is so massively complex and poorly organized, that it collapses under it's own weight. Due to a tight word count, I would prefer to use one word, but an appropriate short phrase would still work. Right now, I think I may resort to 'monolithic', but it feels too bland and I am looking for something more descriptive.
EDIT: While I have received and accepted an answer (which I am using), I would still appreciate suggestions. Thanks again!