this is vaguely related to the string theory related post from a day or two ago, it's all bazinga science folks TL;DW string theory is a big thing because people that read pop science really liked it and it took a long time for physicists to come out in force and say "this is untestable garbage"
No, there's a few episodes where the survivors (and his adopted family) tell the guy who did it how fucked up it was, then he does it again. I can't say they hate him for that specifically because there's so many other things everyone he cares about hate him for it's unclear.
They also go back to the old universes a couple times to see what happened after he irreversibly fucked up the planet, but also removed himself from the equation. The show is pretty clear that every he loves is better off without him.