I find that the "to hell with Smogon" crowd tends to be much more narrow-minded than everyone else, regardless of how seriously they take competitive Pokemon.
I don't know why you'd ask for help if you don't want to be told that something might be wrong. As D_A pointed out, "competitive know-it-alls" don't have biases against gimmicks--good players often use non-standard sets as surprise factor is a huge advantage when done right--but against crappy gimmicks, especially when the OP is being stubborn because "not everyone battles the same way" or "I want to have fun." You're entitled to do that, but no one can tell you how to enjoy Pokemon the most. Only you can. Team raters can tell you how to improve your team. If you don't want that kind of advice, don't ask for it and then unleash your victim complex.
Sap Sipper Azumarill is a pretty amazing example of a bad gimmick. A general rule of thumb for gimmicks is "can it still be useful after the set is known?" Think physical Thundurus or defensive Charizard-X. Those are standard-ish now precisely because they were once good gimmicks. Sap Sipper Azumarill might take my Ferrothorn by surprise, and that's cool and everything, but you better believe that my very next move will be sending in Clefable to set up all over something with no way of threatening me.
More importantly, I think that while the dichotomy between winning or competitiveness and fun can be very real and people can take the game too seriously, I find that many people in the "Smogon is ruining Pokemon!" crowd tend to treat fun and competitiveness as if they are mutually exclusive. This is simply fiction. Do you know what I find fun? Fusing tactical and strategic thinking in a game where anything can happen. Figuring out what Pokemon is my best win condition in a given matchup and then figuring out what opposing Pokemon need to die to clear the way, and how to do that on a tactical level. Predicting 50/50 plays based on what I think my opponent will do. Playing around Pokemon I'm weak against. These things are foundational elements of elite competitive play. And guess what? I find it immensely enjoyable. If I get too stressed from the thinking, I can log off and start fresh. If I just want casual matches, I can log onto the PC server or start a new account and beat up the lower ladder for a little while. So yeah, it's funny to me the same people who complain about Smogon dictating how to play Pokemon sure seem eager to dictate to me how the way I enjoy Pokemon is inferior or tainted or something because it's competitive. Maybe these people need to back off the self-righteousness.
Yeah, competitive players tend to be jerks to people who ask for advice and then won't change anything. They can often be jerks for no apparent reason. The latter is a problem (and sometimes a very big one), but this isn't a black and white issue by any stretch.
(And I don't want to minimize how much people can take the game too seriously and be abusive little brats. But it's also a completely separate issue.)
Lastly, I would just say that the biggest barrier to this issue/"conflict" that arises with "just for fun" and "I want to win" players (again stressing that these are not mutually exclusive) is that neither "side" tends to want to communicate. It's easy to rant about Smogon or pompous competitive types, just as it is easy to complain about stubborn anti-Smogon types. These two types of players definitely exist, but people might be able to tolerate each other a little more if it wasn't "my side is the only way to do Pokemon" all the time. It's like American politics or something lol. (As someone who feels like he plays competitively, but only if it's fun, I find both extremes to be equally insufferable, in case that wasn't obvious.)