Actual problems are things like "I want to buy this candy bar," or "I want to fly to New York in August and I need to pay for the ticket." Those are problems Bitcoin, as "a purely peer-to-peer version of electronic cash" [1], was intended to solve. It didn't.
As far as I can tell, the main problems blockchains "solve" are things like, "I would like to run a Ponzi scheme and not go to jail." Or, "I would like to hype something and make a lot of money off people." Or, "I would like my consulting company to bill a lot of hours." Or, "I would like to gamble on price fluctuations, and gold isn't volatile enough for me." But I wouldn't call any of those real problems in the sense of being things where solving them is positive sum for the society as a whole.
I would be happy to be proven wrong, of course. Blockchains are a cool technology. But I've spent nearly a decade asking for actual customer problems that are demonstrably solved better by a blockchain. I haven't found one yet.