What's the problem? Putin has plenty of other Russians to suicide into Ukrainian drones. It's not like they're going to say no.
The problem for Russia is they're running out of money. Even with suicidal infantry being cheap, those still need lots of equipment and logistics to keep going, and there's nowhere else to source all of that from, whether from within or without. And it isn't like Russian pseudo-allies are really helping.
China, in particular, is double-dipping on them by demanding that oil and gas it purchases from Russia be sold at extraordinarily low prices, with the exact same heavily subsidised prices Russia sells them to its own population, while at the same time selling everything Russia needs for military use at the highest price it can charge. Russia cannot say no to either demand, so that's depleting Russian coffers even faster than they expected. And it isn't like China minds Russia becoming weaker due to this strategy. The more dependent Russia becomes on China, the easier it'll become for China to, someday, demand Russia give back all the Chinese territories the Russian Empire took from them when China itself was weakened during the 19th century.
Ukraine, on the other hand, has developed its military technology in-house, and with such a high level of competence, it's now exporting it and even building drone factories in other countries, countries that are in turn becoming heavy customers of Ukrainian tech and dependent on it for their own military uses, which in turn is paving the way for that technology, that doesn't depend of people on the ground walking toward the meat grinder while making it even more of a meat grinder, to advance at a faster and faster pace.
At this point, there's little Russia can do that'd turn things around other than going nuclear, and even that isn't guaranteed to go well for Russia, as Ukraine has very likely been preparing for that contingency for the last four years. If anything, going nuclear would precipitate the entire world attacking them.
And then to China taking back its former territories even earlier than they expected to.