Nothing against her seriously. I genuinely am a huge fan since her PD48 days, but why are people acting like she's already a successful actress in the making?
Acting is a completely different field than idol performance, and I don't know if everyone knows this but simply being a pretty face does not make you a good actress. I have no idea if Wonyoung will be a good or bad actress, but I've seen some comments like "SK adores her so she's gonna be huge as an actress", "she's an it girl so Knetz will love whatever she does" etc.
If even Suzy and IU, who are significantly more popular and wellknown than Wonyoung, got hate for their acting (initially), what makes you think Wonyoung will get a free pass? Even Hyeri, who starred and was beloved for her role in Reply 1988, still gets criticised for almost all her roles after Reply.
Acting is no easy task, and the audience is very different to Kpop stans. If the idol underperforms, the fans won't be enough to shield their idol from criticisms.