The channel 4 web site claims "inadequate safety and security checks, dirty planes, exhausted cabin crew"
Having flown with Ryan Air asveral times over the past 5 years I can't say I've noticed the above. The pax security checks seem to be similar to the other airlines I've flown with, the planes have never appeared dirty (on the contrary they have been very clean and tidy). If the cabin crew are "exhausted" they seem to do a good job of hiding it.