I doubt casinos do hate big winners, if they didnt exist it would reduce their overall revenue which is where they pick up the profit just from averages not the idea of waging any war or even negative stance towards seperate players. If anything surely casinos want more notable winners so long as it also correlates to more custom, almost every industry its about the revenue and growth etc.
Casinos don't have an interest in individual outcomes. They just want people to wager because that gives them a chance to profit.
I am not 100% sure if I agree with that. Maybe here it is not such a big deal but you do share lambo winners here (which is I am sure not because of anything specific, just to show it is fair) but in other places I have seen people share big wins all the time, I don't want to name any other casinos names, but whenever there is a big win in a casino they share the big win on their bitcointalk topic all the time, and in another place which is a sportsbook they share all the parlays all the time whenever someone wins a big odd thing.
So, I know minimum of two places which are HUGE in their respective parts of the gambling world, they keep sharing all the big wins. If they didn't care about individual success and think that does bring more business, they wouldn't share all those things all the time, whenever someone wins like a 40x or more odds they keep sharing it, or if it is huge amount. Hence I believe there are some casinos who cares, and some who do not care, I do not think that there is one correct answer to it.