Why is Monero hated by Bitcoiners

They'll tell you that it's because the supply can't be audited, protocol upgrades occur on schedule and so the protocol is not decentralized, tail emission means uncapped supply and all this kind of stuff. And those may be points that merit discussion. But the real reason is that it's the one coin they can't mention when they say "shitcoin" because people will pick it over Bitcoin.

You can say whatever you want about altcoins, call them shitcoins. Most are. Say what you want about ethereum and the explosion of "crypto", a lot of it is warranted. But Bitcoin has entrenched interests that will never allow a protocol upgrade to make it 100% private, and so they know they cannot possibly compete with Monero. A transparent ledger is user hostile. Maybe it's their bags, maybe it's their tribe, but for one reason or another the maxis will shut you down when you mention Monero because there's no reason that stands to scrutiny why Bitcoin is better.

Because bitcoin is more of a religion than a cryptocurrency now, and therefore the bitcoin is the only true god crypto, everything else is heresy :)

Like in 2010, Bitcoin was hated for being used to laundering money, same narrative is being attached to Monero. This is because the media and the elites in position donot want you to use Monero.

Besides that Monero is a strong competitor to the use case of Bitcoin. Bitcoiner really don't want their bags to be useless, what they don't understand is that they are powerless to influence the price of Bitcoin, and has been manipulated.

Bitcoin maxies hate everything. Especially the most prominent competitors. They only embrace enemies of their enemies sometimes promoting even pure scams.

They have not had their BTC transaction history bite them yet.

At some level it's the fear of backing the wrong horse. To feel safe you have to be a "maxi", and to be a "maxi" you have to deny anything else can work. Bitcoin is the first crypto most people find, and the "everything else is a shitcoin" message creates a self-reinforcing cult atmosphere. The fact that mot altcoins soon fail reinforces that.

Almost all bitcoiners are there for "number go up" profit, so the price volatility also creates a lot of anxiety. The ones that stick with it become very committed HODLers. It's a bit like an abusive relationship, the pain makes you commit more. Market psychology is fascinating, and is why emotional investors lose their money.

it didn't used to be like this until the 1 mb blocks started getting filled up. people involved in bitcoin were very different back then. it's much worse now.

Bitmaxis know that Monero is a legitimate contender to what btc wishes it would be. Monero is a threat not only to their "bags", but also to their identities, their convictions, and their emotional investments. That fuels their resentment, and finds outward expression as the smear campaigns and belittlement from them.

But not to worry; you know how it goes: first they ignore you, then fight you...

A lot of hate might come from the fact that a lot of Monero lovers here are complete assholes about other cryptos as well.

They may hate it but they more hates shitcoins.

At least monero follows cypherpunk values that's not common.

Because it is not bitcoin. Bitcoin maxies are a cult and many crypto projects have a cult following around them and Monero is no exception.