I realize I sound like a big fish for posting this. If this were twoplustwo, I'd expect responses like "OP must be the real fish"
But I have trouble winning against mega fish if they're so bad that I have trouble putting them on a range. It's like playing against land mines. I don't mean standard fish like the bad recreational players who have some concept of how to play the game and have some identifiable patterns. Those are the ones I make a profit off. But I feel like I usually lose massively when there's a mega fish at the table
Like the ones who are wildly aggro but also can't fold (I'd almost rather be playing against a good LAG). It's hard to make a hand in this game! And the trick is, it's almost never profitable to flat them pre-flop because they always get the pot when you miss the flop
Or the ones who seem like they're just clicking buttons and make absurd looking bet sizes. I really have no idea what it means when I raise, and they donk into me for twice the size of the pot, and I have top pair medium kicker. Or when they bet $20 per street every street.
So at this point, when there's a mega fish in the casino and all the grinders are in line for that table, I'm usually happy to sell my seat for $20 to the grinder who wants it.