Why is Monero unpopular?

Could you please explain to me why Monero seems to be less popular compared to other cryptocurrencies? Is it due to its privacy-focused nature that makes it less appealing to the general public? Or could it be the complexity of its technology, making it less accessible for beginners? Additionally, does Monero's lack of mainstream adoption and integration into existing financial systems contribute to its unpopularity? I'm curious to know your thoughts on this matter.