I will save time and use their description:
A Cake Wreck is any cake that is unintentionally sad, silly, creepy, inappropriate – you name it. A Wreck is not necessarily a poorly-made cake; it’s simply one I find funny, for any of a number of reasons.
When Roissy speaks of high expectations this is not what he is expecting.
Some of the wrecks in their Literal LOLs section must surely have their origins in poor language skills of immigrants or just plain stupidity.
So you see, it is not just an amusing diversion; it is another sign of the decline of the West.
In any case cake is not a low carb food.