Putin.
Putin would likely have authoritarian tendencies, but he'd be respected by the people and he'd aggressively pursue respect and dignity for the nation - even if only for reasons of his own ego. Given that he is quite competent, one could expect him to succeed to a far greater extent than our current leaders or Biden. Putin also has an actual track record for turning a broken country into a less broken country. (I'd want a sunset clause on his leadership though - one that he isn't aware of. Lol).
An American president is playing on easy mode and has a lot of wiggle room before his fuck-ups have any real blow-back for him or his country. Dudes can start wars unilaterally, dick around and get people killed for decades, waste money, get nothing done, and still never face any meaningful consequences.
That's not the background you want of anyone you'd trust with your country.
On top of that, Biden projects weakness. In many countries, that's a big problem - his existence would be divisive.