What's one thing you've found hard as a founder that you never expected to struggle with pre-startup

Balancing the constant need for innovation with day-to-day operational tasks has been more challenging than I anticipated.

I never thought it would be so hard to find a reliable technical co-founder.

Balancing work-life boundaries has proven to be much harder than I anticipated as a founder.

not as founder but as someone who is working professionally, i have found maintaining motivation and flexibility during hard times is very tough.