To girls, bringing a man's chadness out usually means being subby and feminine. She later calls this "the effort she put into the relationship when she tried make it work". She may cook things for you, she me write you notes, she may offer sex more often than she wants and ask after your fets and try to fill them. Her reasoning is that if she plays the role of the woman harder, then you will naturally grow into the role of the man harder. "Man" meaning "do more Chad stuff". She NEEDS her life sprinkled with acts of Chadness in order to stay interested. It is an irrefutable law of nature. And when foids try to ignore it, they ALWAYS fail. This is because it's like holding a weight with an outstrecthed arm. You can manage it for a while, but eventually you have to put it down now matter how strong you are. Even Dwayne Johnson on peak roids has to put it down eventually. With foids it's the inverse. The mental stress of not getting enough Chad acts from her bf, and the feelings of her missing out and her life passing her by, and she bottles up the negative feelings inside until it explodes and she cheats or fights you on things that aren't really her issue because she can't express herself properly.
This is confusing to the guy because as far as he can tell, she fell in love with him as he was when she met him. But the truth is that she didn't. She fell in love with the boy's percieved "Chad capacity" at the time. And the longer he stays the same, the further he drifts away from that dreamed up Chad capacity, the more she loses interest in him. The less she does for him because the Chad dream is dead or dying and the motivation us evaporating or completely gone.
For guys it's like "just be as cute sometimes". You can be a hot mess the rest of the time. You can grow old and wrinkly. Just keep being you and keep being with him. That's literally it. Simple.