want to know why wolverine doesn't lose limbs? because what good is a mostly-adamantium canadian? none. wolverine is immune because he is wolverine, and wolverine is what sells x-paraphenalia. overanalyzing a panel from DoFP (in which the art was still crappy and from ages past, when detail such as ligaments wasn't even thought of) is a bit of a stretch to discredit the character.
as for blackbolt, yes, his scream was still considered to be purely sonic energy back when he first encountered apocalypse. you think dazzler could completely absorb the detonation of an atom bomb? his powers were unofficially retconned into quasi-nuclear energy production (in terms of his scream) later.
to say wanda must've created an imperfect apocalypse because blackbolt could kill him, when there's no evidence pointing toward that but your own fact-twisting theory, is reverse logic. you can't reverse-engineer a situation into fact.
why could magneto tear apocalypse apart? because everything has a magnetic charge, and magneto polarized him. it's very simple. magneto can affect ALL matter, not just metals, because electromagnetism is universal. even at half power, polarizing a battle-worn apocalypse isn't nearly out of his range.
why did magneto let apocalypse begin his tyranny? because he was following xavier's dream, raising his children, gathering outcasted mutants, and generally attempting to take care of the mutant populace when poccy made his coup d'etat. to tell you the truth, i doubt magneto even knew he could kill apocalypse before he actually did it, considering his relatively long time in nur's company without attempting to kill him. remember, just because we know what a character's powers are, or their limits, or their origins and motivations, doesn't mean all the other fictional characters they mingle with do. it's an example of repeated, consistent irony.
also, incredible scan. loved it.
finally, shizzle is urban slang for "real" or "really," not the expletive it's typically switched out with.