Metaphysical beings/constructs still exist, just not conventionally. Possibilities are just that, possible. They don't exist. The very nature of "being possibilities" is extremely paradoxical and defies all reason, and the glare erasing them is far more extreme than just destroying the existent, yet metaphysical.
Also, the Glare being different from the hand swipe makes no sense, since they immediately explain that the reason his hand swipe has so much power, aside from its mass and speed (which is a trifle compared to the reality-rending powers it possessed) was from the power of his eyes. The same power that fueled the Glare was amplified a hundred million times over and used to empower his strike, and yet the hand strike is immensely weaker than the Glare in his base form?
In addition to this, the Glare is deliberately stated to atomize and physically break down. It destroyed the body of the critter into "particles of light" even though that being was supposedly made out of possibilities and should not be reliant or even possess such a body. So not only did the Critter show properties counter what was described in inganock, but the implications of destroying a fully described Critter completely breaks the implications and power boost he gained upon entering his Ultharthotep form.
In addition, striking instantly, breaking time, and covering distance in literally 0 seconds is Infinite Speed, not Immeasurable.
And further into this topic, the Regenerationn of Tesla and Golden King is not valid. He is Mid-Godly for being resurrected by his tale being remembered. The thing he was reliantly immortal on was brought forth and he was brought back from non-existence. It was not by his only Regenerationn that he came back; if Neon died, he was erased permanently. Furthermore, why does GK have this? Because his powers are similar to Tesla's? Even if he did have the same powerset, Tesla is superior to GK, and thus unquantifiably greater than him. GK was destroyed and did not return, and instead of assuming that Gk doesn't have this power, we assume GK both had that Regen level from Tesla (which is already dubious) and that Tesla someone bypassed it, which is another power he doesn't show outside of this assumption. I don't really get why here.
Also, even though Tesla's profile doesn't show it, Tesla has no evidence of being an Abstract, Conceptual entity, and the fact that he can die without lightning being erased from the conceptual map of every individual shows that he is not such a being. A being that can manifest a body made of lightning? Absolutely. A being that is abstract, reliantly immortal, and conceptually bound to lightning? No way. And, once again, I know this isn't on his profile, but it is implied heavily and honestly should be considering what is accepted.