And also: capitalism is failing the majority of people by continuing to funnel wealth to those who already have money. Voters are offered a choice between two options, neither of which actually want to solve this, because both major parties are controlled by wealthy corporate donors. The two-party system prevents any third party, no matter their platform, from having any chance at election.
Democratic socialist candidates got elected in NY because Mamdani is demonstrably helping people in actual, tangible ways. The most famous example is fixing potholes. This is a breath of fresh air for voter and is the same "sewer socialism" strategy used in the first half of the 1900s in wisconsin, which focused on pragmatically improving life for the general public...famously by improving the sewer system.