@mruggeri2 You forgot that first he was saved by his second teacher, then the second? wife, then the first "wife".
The second girl might also be considered 3-5th depending on if you count the girls from the sect he disbanded, the clan leader and his pre-arranged marriage "rival", whom he met a while back again when he dived into the lava to cultivate, the one's his second teacher's body was the Ancestor of. Not complicated to explain at all. I also forgot which order that snake queen appeared in..
So yeah we are lead to believe the MC is a super-powerful genius except he is constantly saved and weakest of the bunch now...