Also how much did it set you back, if I may ask? 2 weeks of a designer, we're talking 10 to 15k, right?
I was never 100% comfortable going through Upwork etc because you never really know. But I spent a lot of time writing up the requirements and talking to people to get a feel.
For better or worse, in the end I went with the marketing agency that was the most transparent.
I met a top notch designer through someone I DMed on Twitter. (If you're not on Twitter talking to people - go there.) He's EUR50/hour.
If you go through an agency, then yea closer to 10k.
Would you be willing to share your designer's profile/website? (if so my email is josh.salsen at fastmail.com)