Problems in The Umbrella Academy Season 4

Pick up the worn-out Jalebi (a sweet) because you won't be able to listen to me on an empty stomach. I've found some amazing loopholes in Season 4, which only the above (God) can answer, because the writers have created a mess.
Question 1: Who was Jennifer? I know she was a girl, but how was she born? If she was born like that, why didn't they show it in even 1 minute? Oh wait, they didn't even want to.
Let's assume she was 6 years old when her parents left her, and her uncle took care of her. But was he her real uncle or one of Reginald's men?
Question 2: Who put Jennifer inside the squid? This is the most mysterious question. We know who took her out of the squid and locked her in the village, but who put her in there in the first place?
Question 3: What was Five's real name? I have two possibilities: 1) Jerome, which he mentions when they're all sitting together, and 2) Max, which we see on a cafe sign in the timeline subway station.
Question 4: What happened to the third Ben or the original Ben? They look the same. They teased us with the Umbrella Academy Ben in the post-credit scene of Season 3, but it turned out to be a plot hole.
Question 5: How old was Reginald Hargreaves? He was over 100 years old when he came to Earth, and he was already old before that. I think he should be around 200-250 years old, but it's not mentioned in the series.
Question 6: This is the main timeline where Reginald never came and the Umbrella Academy was never born. So how did their children end up here? This is nonsense. Can someone explain the logic to me?
Question 7: We know that every time the Umbrella Academy causes the world to end, and they run away, creating multiple timelines. So, if they were never born, the main timeline would be saved. But if Reginald comes back and creates the Umbrella Academy again, everything will happen again. Unless Reginald doesn't come to Earth or doesn't open the Marigold box. But he never came here, so how can this be stopped ?