Is the difference between the past and future friction?

No physicists are above science but they likely to interpret the laws of science.

The statement if difference between the past and future friction, is a surmised and misunderstood statement in the Universe. As there is no such resistance the universal events can encounter when moving through free space. And so a question of friction between past and future dose not arise.

However, events invoke time.

So what actually happening with the occurrences of the universal events are conversion of potential energy into kinetic energy and corresponding dissipation of infinitesimal energy throughout the free space, as they move out from the universal supergravity or singularity.

We may have a better understanding in it, if we consider Max Planck's equation E=hf. Energy-frequency equivalence equation.  At the threshold of Planck frequency, the Universe disobeys the known laws of physics, when supergravity acting on the universal energy content at or beyond the threshold frequencies.

There seem no other fundamental interactions acting on the universal energy except supergravity, abstract mathematics would hint that. Dark energy, in presence of supergravity, seems to prevail beyond the threshold frequency.

As the field of dark energy appears to cause inflation against the supergravity, the universal energy content expands due to the anti-gravitational push, space extends all of its dimensions, and time already began before the inflation. The universal energy content expands and cools down through dissipation of energy and scattering.

There is no counter resistance to the universal energy but the respective pull and push of supergravity and Dark energy, where Dark energy wins.

No frictional effect anywhere in the happening.