Spent 3 months chasing a $500/mo client. They churned after 14 days. Why?

For the first half of this year, we were starving for revenue. So when a mid-sized company reached out about our platform, I went full "enterprise mode." We hopped on 6 different Zoom calls, built a custom CSV importer for them, and even shifted our roadmap to prioritize a feature their team specifically asked for.

After three months of back-and-forth, they finally signed a $500/month contract. I was thrilled. I thought we had finally cracked the code for landing bigger accounts.

Fourteen days into the contract, they canceled.

When I asked for feedback, the answer stung: "It's too hard for our team to learn." We had spent so much time building the custom features and doing the manual data imports that we completely neglected the core user experience. The tool was clunky, the UI was confusing, and their team just refused to adopt it. I was so focused on winning the deal that I forgot to make sure the product was actually easy to use for the people who had to log in every day.

It was a massive lesson in "customers vs. users." The decision-maker loved us, but the daily users hated the friction.

For those who have closed bigger deals: How do you balance custom feature requests with core product polish?

Did you ever have a situation where you built something for a big client, but it ended up bloating your product and hurting your overall UX? How did you handle the transition from being a "custom dev shop" back to a scalable SaaS?