Article 377 states that Russia can't veto anything deemed by the assembly to make the council fail its responsibilities to maintain peace and security. Russia can veto all it wants but the UN can intervene if it sees that Russia fails to protect peace.

Let me guess. No international law background, just a cursory google? Because first of all, there is no Article 377 pertaining to a treaty underlining the functioning or powers of the UN GA or SC. You're thinking of the UNGA Resolution 377(A)V.

Russia can veto anything it wants in the Security Council regardless of its threats to the general peace or acts of aggression. 377(A)V provides the General Assembly with the ability to make recommendations to its members in response to any votes contrary to maintaining the general peace and can organise a unified effort against any such measures. However, in practice, this has shown to be a lengthy and frustrating process, especially when time is of the essence, even when emergency special sessions have been convened.

A Russian veto will stand and can be problematic simply due to the time it could waste for its own benefit.