But the Soviets did try to cozy up to the UK, France, etc. Before the Molotov-Ribbentrop pact came into being

Because the Soviets knew that the Nazi's wanted to to Manifest Destiny in Eastern Europe.

They were turned away because western the powers thought that the Nazi's would do the dirty work of destroying the Communists for them.

So, to bide time, the Soviets see no other choice but to make nice with the Nazis for a time.

We can look back, with the benefit of hindsight, at aspects of all this, and say "Damn x thing about this sucked shit", but I think you're being overly simplistic in your assessment

The Soviets plan was to make a non-aggression pact to buy themselves time to not get invaded since they knew that it was coming.

And as SpookyBogMonster said, they did try to achieve that a decade earlier with the western powers but were rejected.

This is however besides the point. Stalin was a part of the allies and not upvoting something just because Stalin is present in the picture is dumb.

The Russian people beat Hitler

Same goes for the rest of the allied soldiers but hey, it's Churchill and Franklin we speak of