You also argued that this is analogous to water on the Earth's surface. You know, one of those things which aren't directly subjected to UA. This is where your appalling understanding really shines through. "If UA affects the Sun, then it should act like water on the Earth" as an argument boils down to "something affected by UA should be indistinguishable from something expressly unaffected by it". Or, in terms of propositional logic: true is false.
Water is not directly subjected to UA, but it is subjected indirectly by Earth pushing it upwards. This is why it is "flat". If the Earth consisted only of water then the ocean would still be flat because of UA (assuming that UA could affect water in this scenario).
So if UA applies to the Sun then it should also be flat unless it is a solid object or a liquid/gas in a container as hvanmunster suggested.
In any case this is a debate so I do not understand why one needs to be replying in an aggressive manner.