Meng Haobo was berated by Elder Master Meng until he was thoroughly chastised, thinking back to the night he violently beat Meng Suizhou.
That night, he ordered Meng Suizhou to kneel, and Meng Suizhou did so.
He asked the butler to bring forth the family punishment, and Meng Suizhou was beaten so badly by him that he couldn't stay on his knees and fell to the ground. Yet, he did not run away, nor did he resist.
If Meng Suizhou had not regarded him as a father figure, and if Meng Suizhou wasn't foolish or incapable of defeating him, why else would he obediently kneel and allow himself to be hit?
How ridiculous it was that he was bewildered by Zhang Chunru, his mind and eyes filled only with "obedient and well-behaved" Meng Xiao. Meng Suizhou, the "unruly son who didn't take him seriously," just didn't look right to him in any way.
In the end, it was just because he had raised Meng Xiao by his side since he was young that he was biased toward Meng Xiao.