To start with, they aren't cruisers. This is a missile corvette, the closest equivalent in the US fleet would be a littoral combat ship. That may not look much better in terms of cost, but to generalize on displacement/capability corvette -> frigate -> destroyer -> cruiser. The Russian ship here featured 8x VLS capable of Calibur missiles and a ship borne Pantzir air defense system. By way of comparison my country is building a new class of frigate which will carry 8x Naval Strike Missiles, 24x Sea Ceptor missiles, 24x multirole VLS, 2x twin 324mm torpedo launchers, and a helicopter (some guns etc). Hopefully that gives an idea of how important it is to not randomly use terms like "cruiser" for any ship painted grey by certain media outlets.