I'm glad you're willing to give Bastien a shot! He was much better paced and so sympathetic <3
I really felt like Guillaume was toxic... The MC sounded scared when waiting for him one evening, he constantly was yelling and then saying he loved her, felt like walking on eggshells all the time, and then he does acknowledge he was wrong but they both just laugh it off. His "getting better" happens practically overnight at the very end too so IDK. I would not be able to laugh off verbal abuse that has lasted for months and just go forward being happy like it's fixed now...