Webnovel Author: SliverFang - Novel Collection

What? Arnold only turned on the guy after he betrayed the group. He was the one to convince the MC to bring him in initially, before he knew the man was scum. Arnold wouldn't have accepted the MC murdering the guy without any evidence, and after there was evidence he had no issues with that.

What you are making up is an issue out of something that really wasn't wrong of the MC, not the details of the event. The MC doesn't want to go solo, he wants to form a group of strong people, so he does need to care about what others think of him and his actions, he needs to be trusted so he doesn't have to watch over the group all the time, to make sure they don't betray him. He knows that Arnold has potential, so he cares more about Arnold's feelings. Besides, he isn't so strong to ignore numbers, and for some reason enemies grow stronger than he expected them to based on his prior experience.

The story has a decent premise and it would be an ok read if it was more consistent... Numbers, abilities and the timeline itself get confused. Events are different from what MC experienced first for an unknown reason (so that it's not too easy for the MC, probably, because nothing he actually did should've brought the change). People set up organizations and camps within days of the apocalypse, a couple of weeks in and we meet someone who had been surviving for a couple of months in a grocery store, the MC is supposed to get an ability every level, but he gets to level 4 and has only 2, then he gets another ability when he levels up to... level 4! He keeps people that he knows are waiting to screw him over because it's entertaining, or believes that they are useful for now so he waits until they actually do damage before he deals with them... He complains that his group doesn't have enough strong people, but when he meets a new person he does everything to make the idea of joining his group look as unappealing as possible by acting like a huge cunt for no reason - he doesn't even really need all the supplies he steals from the person. He excuses it as a test of character - meaning he wants someone desperate and won't stand up for themselves.

The MC wanted Arnold to trust him. If he went alone with the guy others know he doesn't like and returned saying he died, how do you think others would react? Even if they don't have evidence, they would never be at ease around him. The girl suffered because she stayed with the abusive partner. There's plenty of meh about the story, no need to make up stuff.

It's possible, but he'd also be wasting time with that. He can't buy all that much with pure cash, as he'd need to go to each place in person so it's a waste of time, plus it's way more suspicious, so he'd have to bank it. What will he do? Withdraw the money only to deposit 100k times more shortly afterwards? Then get arrested because the serial numbers repeat? He could withdraw a thousand dollars and then deposit that so he would have tons of spending money, as long as he doesn't spend too much in one place, but it's also possible that he did that in the background and it's just not significant enough to mention. The story has plenty of issues, but that's not really one of them.