I see, but that's weird.

In this sense, if this time-speed relation is continuous, the faster a thing will move, the less time flow it will experience. And as someone else suggested, if one could accelerate further, then it would have to see things going back, but that confuses me and it's another story, because me accelerating further would require me being observed as going backward too, but I'd be going the same direction... Then perhaps it's an automatic thing that, after this speed limit, the direction of the vector just rotates itself backwards? But that doesn't sound nice either.

I guess we will have to assume, speed of photon is the maximum, and zero is the minimum, and there can happen no bending beyond these extremes due to some dimensional restrictions or something.

Then, in a similar sense, something with zero speed, should experience the whole time being as fast as a moment, like the cosmos gets born and dies at the same time, yet it might have to stay still at the center of the universe for that, because its coordinates should never change to never have any speed, and at the beginning it was a point, I guess.