I don’t wanna get too deep into plot hole bullshit, but I feel like I gotta point out the, like.
“The Celestials are basically gods. They can handle an ancient weapon of pure explosion without exploding. They can create matter at will. They can project their consciousness across millions of lightyears. Also, if you strap a small bomb to their brain, it will kill them instantly.”
Ah, but that was more or less the exact same thing he did to Meredith. So I like to think he was killed by the concept of Justice