Theory on why G-Toilet was ejected on Earth and was stripped of his Astro technology.
As we know from episode 74, G-Toilet was a former Astro Toilet and it was basically confirmed in episode 77 by the conversation between him and Juggernaut. And then after arriving on earth, he somehow makes virus using the Alpha Hills lab and starts infecting humans with it building an army.
I believe they reason why he was ejected on Earth was probably due to command of someone high,Ike Astro Duke or Emperor. He may have made a mistake that caused the Astro Toilets to see him as "unworthy". And so to prove his worthiness, the high tier Astro Toilets send him on earth without their technology and see how much progress he can make without their weapons and using the resources of earth. And Scientist Toilet was also an Astro Toilet which was confirmed in the picture of episode 70 part 2/full episode as he had Astro Ring on his back in it. I believe he was sent along with him so that he can make the necessary weapons for him. And maybe DJ Toilet was Astro Toilet who was sent with them too but I am not sure about that.
Astro Assailant, Astro Detainer and some other Astro Toilet troops on earth before the actual Astro Arc as we saw in some episodes and based on the info Boom gave us. Astro Overseer was working with G-Toilet until episode as we can see him shooting the Cameracopter so he can distract Upgraded Titan Cameraman towards him so that Skull Acid Toilet can teleport in and destroy the disinfection tank they were bring to him. I think Astro Overseer, Detainer and the other Astro Troops were there just to report his progress and occasional help. It was until episode 60 specifically when G-Toilet had betrayed the Astro Toilets and caused their separation. Astro Assailant definitely knew that the G-Toilet he was talking too was a clone. I believed why they wanted to kill G-Toilet's clone because they believed that he is not "worthy" because almost plan of his against the enemy failed and he also just lost Titan Speakerman's control so they didn't care about his plans anymore because of his "unworthiness". And they only didn't killed the clone because he probably betrayed them too at that moment and they thought they might get jumped so they just left , probably returning to the Astro Toilet base to report and getting upgrades at the same time.
And as for G-Toilet, I think his "someone" Juggernaut was talking about was definitely Astro Duchess and I hope that she is his daughter and not wife because that would be really weird ngl. And the suffering of G-Toilet is probably how the Astro Toilet's sent out Astro Duchess our in the battlefield when she was young which probably caused her to get injured a lot of times and it felt painful to him but he had no choice then. His wife probably died fighting as well. But I do believe she became great at fighting after a point causing her to become an elite soldier and then the Astro Duchess. And probably due to how much she had to kill as a child, she became cold, so much in fact that she is now willing to go against her own father just to serve her empire.