/pol/ isn't trying to be like the millions of other politic discussion forums online. It's literally intended to be politically outrageous so when people like yourself complain that it's full of outrageous alt-right content you're typically missing the point.
It's full of things that appear to be alt-right because stuff like racism, sexism and transphobia is extremely politically incorrect. While far-left views might be equally reprehensible, these views are not seen as equally politically incorrect. It's actually quite hard to hold politically incorrect far-left views unless you incorporate some far-right views – being so pro-trans that you hate biological women or something stupid. This is why you tend to see less left-wing content there. It's hard to be offensive and left-wing.**
But even then I think it's wrong to say /pol/ is full of alt-right content to be honest. There are alt-right people there for sure, but huge amount of the political memes posted on /pol/ are mocking the alt-right and the right more broadly. The board is constantly roasting the MAGA movement, for example.
As a brit my favourite threads on /pol/ are the brit/pol/ threads which basically just post politically incorrect memes mocking Brits and joking about how shit the UK is. These threads largely just Brits shitposting with each other and it would be wrong to assume the existence of hateful anti-British content on /pol/ is somehow evidence that /pol/ is xenophobic against Brits. People should take a similar views of the racist/alt-right threads – the vast majority of people there are just trolling and being offensive for a laugh. You don't have to like the humour, but most of it is just people shit posting.
> they actively delete and ban posts that go against alt-right.
Loads of stuff gets removed... If you're posting content that "goes against the alt-right" you're probably taking the board way way to seriously and you probably should be banned.
** Interestingly another commenter in the thread asked about why there's so much interracial porn on /pol/ if it's so racist, which kinda highlights my point here. Just hating white people isn't politically incorrect – there's people doing that all over Reddit. To make hating white people offensive you basically have to incorporate racist stereotypes about about how whites are genetically inferrer to blacks in various way, but then in doing this you'll get viewed as racist and alt-right because you're using racial stereotypes about how blacks are more athletic, etc.
If you're up for it I challenge you to be politically incorrect from a left-wing perspective without it being possible to argue that it's actually far-right.
