Thanks for the feedback. We strive to make the onboarding as smooth as possible. We used to display a long categorized list of suggested follows, but that took too long for users to go through while onboarding.
Note that we are not using any algos for the new suggested follows. We are simply working off the same categorized list; we just let people choose their desired categories. Our list of suggested follows is publicly available btw:
https://listr.lol/npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg