Is it really just criticism or is it just outright flame bait? I never ventured to her twitter account to see, but I'm pretty sure she was getting nasty comments. I always loved how people would say they're critiquing someones' art when they're just saying 'This stuff sucks' That's not how it works.
If she posted a tweet asking opinions/criticism of the game that's one thing. If she's posting her daily life, it's not the right place or time. I can't stand those K-Pop fans on Twitter that always spam their crap where it's not even relevant. These are the kind of 'fans' that give the rest of us a bed rep. We try to bury them under the ground, but Animal Crossing has a toxic underbelly community.
I may not agree with everything they did in NH, but I'd never go and harass anyone who worked on it. Sakurai has gotten so much crap from 'fans' that I'm surprised he hasn't deleted his account.