Great SSF experience

You either accept the fact that there's only so much you can do in SSF Affliction league with your current time and knowledge, or you come over to Standard SSF where the player base spends months and years getting to where they are.

The people you mention running a ton of the end game content took them a long time to get their character to where they are.

Also, you could straight up go over to the PathofExile builds Reddit and ask for an uber zhp instaphaser and getting boss maps like Shaper, Elder, Conqueror and Synthesis is very doable with map rushing or Destructive Play w/ switching between 10 maps.