I'm sure getting his friends and his baby back made Nick happy. That's a given for a guy who's got a weapon that can change time. But then the series flash forwards to 20 years later. What's changed? Well, let's see. The kids are grimms now. Duh. But the relationship with Adalind apparently hasn't apparently changed. Otherwise the series finale wouldn't have brushed it off in one sentence about Mom and Dad waiting.
The best way to frustrate a cyberbully is to ignore him.