Why didn't he shoot Todd?

Also I do think Todd bought pizza and beers still. Todd is a creep for sure, but I do think he's genuinely nice. I feel like he's just off a little in the head and because of that he's not rational in his decision making. He killed his maid just because she saw his money. He didn't think she would've taken it, but he feels like within the lifestyle he lives that's what he's supposed to do. The same reason he shot the kid.

He's pretty defeated by that point. I don't think he believes there's any way he could get away with it and not be directly responsible for them killing Brock.
And he knows that they would.

Todd will do whatever needs to be done without a second thought even if not enjoying it but the others get a big thrill from a kill.
And they'll take any excuse.
Jesse pretty much thinks he's f#*ked and there's no way out..

"Also, do you think Todd did bought the pizza/beers? I don't."

Hahahaha this guy (OP) asks the real questions! No really, I wondered the exacte same thing. XD

Because he was emotionally broken and defeated. He wasn't as strong as Todd and it was easy to intimidate and manipulate Jesse and Todd was good with those skills. Jesse was afraid, couldn't risk and just did what Todd asked him - gave up. Some people are easy to manipulate, especially if they are trapped and broken.

The impression I got was that Jesse had become sort of 'institutionalised' into living in the cage. He had been beaten down physically and mentally so much that he couldn't break out. IIRC similar things happened in WW2 when British soldiers in Japanese prison camps were liberated, some of the men just refused to come out of their cells because they couldn't cope with the outside world any more.

He knows that he is not in a position to save the kid,
and he saw what they did to his girlfriend.
He doesn't want to do any more bad stuff.
So, he folded. He couldn't do anything else.
Did that really not make sense to you?

I do believe Jesse was broken mentally at that point and too afraid to do anything, and was probably also thinking he may endanger Brock's life as well if he goes through with it. What leaves me wondering is whether the rest of the gang would have gone ahead and killed Brock if Jesse had killed Todd and fled. They would for sure be chasing down Jesse, but would they bother killing anyone Jesse loved if they never found him first? If they can't use their deaths as a tool to punish him with then there's nothing in it for them. I'm not even fully convinced they'd have killed Brock even as a means to torment Jesse. That would have been Todd's idea but he was a full on sociopath. For the rest of the guys, who knows. They may have been happy just to torture him and kill him.

I think he bought the stuff. Todd didn't care about stuff like that.