TikTok ads agency – does it actually improve results?

I’ve been experimenting with TikTok ads but finding it harder than expected to get consistent performance, which is why I’m thinking about trying a TikTok ads agency. The platform feels very content-driven, and not every ad seems to work the same way as on other channels. For anyone who has used a TikTok ads agency, did they help refine your targeting and creatives to get better results, or was it still a lot of testing either way? I’d really like to hear some honest feedback before deciding.