People who are entangled in emotions usually feel awkward around each other.
For instance, when he and Wen Qunxiao were dating and got married, her ex-boyfriend was spreading her "scandalous photos" far and wide, causing a huge commotion. Even though he was a soft-hearted person, he couldn't help but want to drag that guy out and beat him up.
Of course, he never actually got into a fight, but during that tumultuous time, he had to protect his girlfriend and deal with family dissatisfaction. Eventually, he couldn't withstand his parents' disapproval and ended up going abroad with his wife to register their marriage. Years later, he did take action against that man, luring him into gambling and incurring a huge debt. Naturally, the man couldn't repay the money, and Xia Youbiao didn't need him to; he simply cut off his right hand as repayment.