All you ever do is say "That's how it is. You're wrong. Listen to me". That's why no one wants to read your posts. If you want to see reasons why swift swim is broken go read the last 10 pages or so because I'm tired of repeating the same things only to have you come in 5 pages later and say "nope you didn't prove anything. I'm right, you're wrong".
I've read all of the posts.
time to start listing i suppose since you seem to need evidence... though I figured the fact that it was never broken before would prove it to you enough. If you can wall a strategy for 8 turns, what makes that ninth different? or the tenth? only the restart of the sweep after fixing counters. thats the only change. most rain sweepers didn't get to stay in most of the 8 turns anyway because they'd get walled and be forced to switch. the problem tended to be getting back in in gen 4.
anyway, thats beside the point. I'll list a good number of counters to swift swim, and maybe you'll start to realize that i'm saying I'm right because
I'm a math major and I've done the calculations, and i'm not just spouting about something that isn't proven to be true.
Kingdra:
stabs include water and dragon.
common moves are draco meteor, outrage, hydro pump, and waterfall. also commonly runs sub, and in this gen is commonly special-based for now. In older metas it commonly ran chesto+rest and DD. It is also known to run hp electric or signal beam on rare occasions, and more commonly ice beam.
Synopsis? probably the rain user with the most raw potential to do damage on both the special and physical side. For these calculations I will use the most common moves seen on various defensive pokes, and show the potential to counter.
Fisrt, nattorei.
Hydro pump on specially defensive natt does only 85-100 damage (including the rain buff) Draco meteor does less. Specially defensive natt also only takes 77-91 damage from waterfall boosted. This leaves plenty of room to throw out a leech seed, twave, and even a power whip for 162-192 damage with min attack. In most cases, just the twave alone is enough to crush any advantage that might be gained from swift swim.
Classic flinchrachi can live through a hydro pump (taking 261-308 damage) and can twave, revenge-stopping it but not countering.
Physically defensive (as is classic in CM sets) suicune can come in on DM for 156-183 damage. Then can easily take more hits as the satk goes down while using combinations of rest, CM and ice beam to take it down. (the water hits are joke damage, figured i'd mention just the relevant one on this set).
bronzong can come in on a revenge, Take the single hydropump, and trick or explode kingdra. Brozong also easily switches into waterfall.
Empoleon resists all of kingdra's attacks, and in fact can use the opportunity to grab a sub and counter possibly any other swift swimmers that might come in.
Specially defensive celebi can easily switch in and twave then rest, allowing it to come back later since it can take the hits no problem from DM (less than 1/3 hp). Psysically defensive celebi stops outrage just as well.
As always, if its a special kingdra, blissey laughs at it. If its phys Skarmory laughs at it.
I've barely glanced at the pokemon lists to make this, and i know there are many more viable counters... though really that is enough for kingdra.
Apply these same principle ideas to other pokemon with swift swim, and you'll find they all have large numbers of pokemon that wall them, some of which wall without even being threatened back.
Swift swim: not broken. End of story.
These pokemon just don't have the power to sweep whole teams, and need support... the issue is when they can switch around countering for a bunch of turns, then once your last counter dies switch in a swift swimmer and finish for free.
edit: I should mention that the only reason drizzle is seriously being looked at for ban is because it removes the setup turn for power and speed. Imagine if any pokemon got a +1 atk on their stab and +2 speed boost just for switching in. It's not the fact that those boosts are broken, its the fact that they take absolutely no setup turn.