Because last episode, Diane's trying to tell him why she's upset and PB just gives her the Your Feelings Are Valid And I Hear You platitudes without actually addressing what she's telling him
Like when Todd is asking Diane about his sham marriage to Courtney Portnoy, and Diane replies that ALL marriages are shams because you don't really know in the end if it's going to be forever
She does go on to add that there is a nugget of SOMETHING underneath all of it, which is why people go through with it and get married anyway, but I think she says something similar to PB at the end of this season, and adds that she's sick of trying to cling to that one tiny thing
"And sometimes it's hard to remember that pure, shining... thing because it's been painted over with so many arguments and comprimises and disappointments."
I latched onto Diane because I can 100% related to her general feeling of, "I'm in my mid-thirties, what the fuck am I DOING with my life and why can I never be satisfied"
"However, a remark she makes that PB should never give up on his heart and ability to care about people gets misinterpreted, and he ends up challenging Woodchuck to a ski race for the governorโs seat.
Todd ends up winning the ski race purely by accident and thus wins the governorship, then resigns, triggering a special election and rendering the whole thing meaningless."
"Though she says is strongly anti-gun, Diane ends up holding the gun then shooting it at a range, impressed with the empowered feeling it gives her. She then pens a runaway hit article for GirlCroosh about why she now owns a gun, spurning a rise in women getting concealed carry permits.
This in turn causes more tension between her and PB, who is also anti-gun. She tells him she still dislikes guns, too, but loves the feeling of being safe and confident that owning one gives her, and reasons that she should be allowed to after PB allowed fracking on their property.