I watched this drama way back when it came out in late 2020, and I still hold it in high regard.

First of all, yes start up is based around romance but so much of the story is also dedicated to their actual start up company. A good majority of the plot is dedicated to overcoming the adversities with their company, and prejudices against Dalmi for not having a college degree, as well as strengthening their relationships with each other along the way. The plot about the companies is something that makes this drama unique and compelling, and a lot of people overlook this part of the plot since they're so focused on the romance.

SPOILERS //
As far as the romance goes, I agree that is isn't perfect, and I also wanted her to end up with Jipyeong, but it was still a great romance story. The end did feel rushed, but I think all the conflict with the letters was interesting to watch, and it definitely kept me looking forward to the new episodes that came out every week.

Overall, start up is a great drama, with an excellent ost, amazing cinematography, talented actors, and a compelling story, that doesn't deserve all the low ratings its been getting.