They did receive such assistance. Massive FDI (Foreign Direct Investment) and tech support in developing their energy extraction and export infrastructure pulled them out of poverty. The strength of Russia today is the direct result of such assistance.
The US also granted them MFN (most favored nation) status in 1996, pretty much as soon as they applied. China only got MFN in 2001. MFN also opened up the FDI stream.
One can, with reason, argue that it was exactly that, the US/western support for Russia, that created a monster, that could afford (or so they thought) expansionist wars and dreams of a restored empire.
Russians have a thug mentality. If someone does something nice to them instead of punching them in the face a Russian will think it is because they are weak and tries to rob them.