Squarespace email campaigns seems to be useless

Is it just me or is the email / profiles implementation EXTREMELY limited? The filters for segmentation are based on order dates or amounts but there is no way to segment all customers who bought a specific product, or didn't buy it. I can add tags but only to one profile at a time!!? I cannot filter all my customers who signed up organically, or the ones I imported. Even with the date filters you can only find users 'before' OR 'after' a date - there's no way to filter profiles from BETWEEN two dates.

How is anyone actually using this system? It is SO far behind the other dedicated email marketing platforms. I wish I had looked deeper into how ridiculously limited it is before I paid for it.

We're having similar issues - would like to have an automation campaign when a user signs up for a membership but having issues with connecting segments/member area sign ups to automatically get added to a mailing list. help!