Pizza with mushrooms, green peppers, beef, crab meat, and oysters from the can

Funny, you're the second person here to say that.

Do people just forgot what communities they're subscribed to or did I end up in the main feed somehow?

I agree that presentation is probably at least half the reason I posted this here, but it honestly also looks a little too dense to be enjoyable. I can't imagine any of the ingredients being able to properly develop their flavor in this setting, especially not when smothered in this much cheese. If the oysters are smoked, as they usually are when they come from a can, they'll have a very strong earthy flavor that would need something to lighten it up, but adding ground beef would likely just weight it down. Can't even imagine being able to taste the crab at all in that scenario.

It basically looks like a casserole on a crust, and not a good one at that.

I found this on Facebook, didn’t eat it personally.

But according to the description, it mostly just looked revolting but was apparently fairly decent.

Yes, lots and lots of cheese.

Unfortunately it appears to be cheddar which probably doesn't do much do improve the dish except mask some of the oyster funk.

Surf and turf perhaps? I honestly never had that but I do realize that's a thing, although it usually involves steak, not the kinds of beef you'd usually find on a pizza.

Have you ever heard of fresh oysters?

Yes they're pricey and may be somewhat difficult to find depending on where you live, but they taste VASTLY better than the canned ones, probably because the latter are usually smoked and packed in oil to preserve their shelf life. I have seen fresh oysters sold shelled and packed in brine in a plastic tub, but I think they don't really keep fresh for all that long.

Now that I could see working. Perhaps with some feta and a Sauvignon Blanc?

That seems a tad excessive but you do you.