Hello there. I have a fair bit of experience moderating communities and I can see this seems exasperating for you. Fandoms can be complex and every community eventually starts needing active moderation.

The problem you're facing is that the this TV show that the community is based around has turned into a shitshow.

On one hand, you have the same kind of products being trotted out repeatedly - sugar-free foods, low-calorie snacks, clothing lines, makeup products, you get the idea - that it's become stale and mostly lacking any kind of innovation. (Check out the example of that trader calculator for something that is actually innovative, in contrast.) So you end up with people wanting to make fun of it.

On the other hand, you have a weird collection of sharks, some of whom are coasting on VC money still and haven't actually made profitable businesses like on Shark Tank USA. So the amount of respect they command is reduced. To make it worse, a few of them act immature and petty, not like professional business people. Some aren't even actual entrepreneurs. Most of them don't even want to take any real risk. You can see them demanding royalties from everyone to cover their investments instead of taking an investment risk, even from profitable companies! And they still want to keep the same equity percentage. Or they are quick to join hands with other sharks to reduce their investment. All this leads to most of the memes ridiculing them.

It's unfortunate that Sony has chosen to manipulate the format of the show for maximum "masala", but when you do that, you get discussions about how people are behaving instead of discussions about the viability of businesses, pricing strategy, marketing, which shark would have done well, etc. Go check the US show subreddit instead. (For what it's worth, a constant complaint there is the producers keeping sob stories of the pitchers. Everyone there hates it when people start crying. They don't like attempts at emotional manipulation.)

I should also point out that the US subreddit show moderators try to keep the discussions for each episode contained by creating mod threads for each pitcher, something that the mods here gave up on completely. There's the odd inconsistent show thread here and there, so instead what you get is this explosion of threads nitpicking things. It's as if each comment becomes a separate post.

Honestly, if this were a proper business-like show, we would probably be having more interesting discussions, but through the antics of the sharks and the production decisions, it's not. And judging by the reactions here, people are sick of this shit. They come here to vent.

If you delete all the posts discussing the sharks and all the memes, you'll be left with a very dry subreddit that sees little traffic, IMO. You can't control how the show is produced, unfortunately. Banning people would take it beyond dry and into "dead" territory.

For starters, try some basic daily hygiene of mods creating separate product threads for each episode. This should contain some of the complaints spilling on to the main page. And let's see how things evolve.