I do put it in a separate bank account (a company account), but up to now I take drawings in chunks, maybe every 3 months. To make YNAB easier I am trying to take a chunk once a month, which feels very unusual.

There is also other random income that's not income. In the UK it's common for savings account interest to be paid back into the linked current account. For me that's not income to be spent each month, that's money to be re-invested.

None of this addresses ease of use though - or does no one else (or their partner) find YNAB confusing and difficult?