Yes,,I would imagine 24 years of abject loathing would have taken its toll,,though the end product would have brought a huge sigh of relief to RWB.
Would he have felt any differently if " the boy " had been somewhat different in character.? I wouldn't have really thought so,,as both children " were intrusions " as far as anyone was concerned and mucked up the thoughts of any direct legacy.
From RWBS' point of view the whole adoption thing proved a disaster in his life. Of course he'd go to great lengths in helping to secure a conviction,,but he got paid-back for his trouble,didn't he.?