Russia's main problem now isn't lack of man power, any way, but lack of equipment.
It is interesting that none of its allies came to its aid, while the US was able to force its allies to cough up support. The US seems to have a much tighter leash on its vassals - which was also demonstrated during the Iraq and Afghanistan wars, where the US was the invader but still got its "coalition of the willing" to follow along - and this is indeed a signal of Russia's decline.
Russia would not accept aid from any country knowing that the bully USA would impose sanctions on it the next day. The exception is Iran, which has been under sanctions for years anyway.
The only Highway which remains to move in and out of Bakhmut marked.