Eugene’s death helped build his path to villainy, Alexis also goes on to loose his mom and younger brother and half his people to a plague? His circumstances just culminated into it all, so I guess you can say after.
Not quite sure, but I think the previous life Eugene(og Eugene) doesnt give that much of impact towards ml, yes, he did crave out a mountain to built a train tracks but it was only because the king command that he is not entitled to anything from Eugene though they were married
And by looking at og Eugene's behaviour before mc transmigrate into him, the og version is not someone who ml gonna fall in love with.
I bet there were several series of event that leads ml towards villain and one of it is the death of his mom and younger brother
In the original timeline did Alexis turn to be villain before or after Eugene dead? Bcs if its after then i think the root of what he did is after his husband dead? But well now in this timeline i strongly see Alexis will mot be villain bcs Eugene still with him