re: No matter what direction we point a telescope, we always look toward the Big Bang - why?

Because you are thinking of the Big Bang as an explosion IN space, and material moves away from it.

The Big Bang was an explosion OF space. Where the mass within increases the spaces between each other.

This is also why Webb telescope finds its value. Over a long enough distance, the expansion of space begins to have an effect on the movement of light, causing a Doppler effect (how a car sounds different when it’s coming towards you vs when it’s moving away). This effect shifts light more to the red end of the spectrum, turning visible light (what Hubble sees) to infrared light (what Webb sees). This is why Webb is citied as being able to see further than Hubble could.

The long range stuff doesn’t appear in the wavelengths Hubble can see.