Looking at other isekai/"write the story summary as your title" story, it is possible that someone is a bit jealous and want the MC to switch their love to only him/her. And they decided that pushing the MC to the depth of despair and then saving them will make MC fall in love with them.
Not a...
They are pretty lucky then.
In my country, after first phase, the strong man soon enough turn into weak man and we just skip the second and third phase.
They don't even need to be in position of power.
Just give them opportunity and they will make sure it's hard for other to get achievement, and whenever possible claim it for themselves.