I mean. Who has actually straight up defeated an MG with pure power, no trickery, no prep, no special equipment?
No one.
Touma literally lost and only won cause tnj.
Aleister got his ass beat and only succeeded in nerfing the mgs and killing zombie because trickery + AAA.
Aleister couldn't even defeat Nerfed MGs on his own and need Noukan with AAA to do so.
Accel only stalemated Nepthys
Coronzon's best feat against them was fighting equally with one and then being turned into a playtoy by all of them.
Even characters supposedly equal to them have asterisks.
Golden Dawn members at their peak can see MG level magic, but they need prep for their rituals.
Coronzon needs prep and rituals to cast MG level spells.
Transcendants need to use risk 4 and can't restore the world after they destroy it anyway.
Also @Paxton, can you stop with that "Othinus only destroyed 1% of the human world" headcanon? This is never supported, other than the Pure World and Hidden World, Othinus destroyed most of the world and its phases. The interactions between the four worlds and the phases+sephiroth trees hasn't really been explained yet.