Zero health on seasonal character

I will embed your images for you.

In your post, you said you had no health, but that is not true. You have 3,412 health. If you are not wearing any gear and you have no paragon, then it is normal to not have any health regeneration, since this comes from gear. It looks like you are level 53, so you have no paragon points.

If you are using paragon points, but still do not have any life/sec, and that is usually due to wearing or cubing Death’s Bargain pants.

See:

You say the game is unplayable with no gear, and that is normal. You need to put on gear in order to fight the mobs, since they level up with you.