Similar to chainfail / chain-fail / chain fail, "Epic Chain-Fail", is a series of fails, usually (in strictest sense of epic chain fail, not mere hyperbole) deal-breaking fails, not just minor fails, not only in a experiential or temporal successsion, but also in another dimension, or exponentiating too.
fail < chain fail < epic chain fail
fail < epic fail < epic chain fail
either chain fail, or epic fail could be worse, depending on the specifics. there is no worse than epic chain fail known. there is no "chain epic fail", as the "epic" in "epic chain fail" already implies fail os of epic proportion, either (strictly) in each fail's own right, or as the cumulative result.
"I tried google+. fails with privacy/security/bigbrother concerns, getting so far into my social life to know more about me than just searches, they admit they report it to govs. fails in having to use 1 of the 4 big name browsers. fails with useragent change. even with right browwser, fails with another dozen annoyances in it's interface, each a deal-breaker, i decided i'd made too many allowances, time to declaire googleplus epic chain-fail, being so widespread, likely to spread further as users get locked in (to it AND browsers), wanting to talk to their friends on it."
"the reaction in a nuclear explosion, is like an epic chain-fail on the atomic/subatomic level"
"he had been t-total for 38 years, drank too much cough syrup, which lead to drinking a bottle of tequilla, and some meths. he trashed his house, killed his baby, raped and severely beat his wife, set the neighbour's house on fire, called up everyone on his phone ruining all his relationships, tried having sex with a child's ride out-side a charity shop, swam next to a sewage pipe, had unprotected sex with several prostitutes, to wake up several days later in prison, with a guard explaining he burned down half the town, contracted and spread several diseases, alienated himself to the nation, and was facing charges of manslaughter, assault, rape, vandalism and much more. ...all because he didn't read the label on the cough syrup. epic chain fail."