I feel you. Designing emails should be easy, not painful. If you're after a solid WYSIWYG editor and actually great customer support, MailerSend may just be your option for your transactional emails (https://www.mailersend.com/). And MailerLite for newsletters with the best deliverability. Keeping both transactional and marketing emails separate helps you in building and maintaining a good sending reputation. Disclosure: I work for the parent company, but have done a lot of competitor research — MailerSend provides the best prices that you'll see in this space (12,000 emails/month for the free plan and US$25 for 50,000 emails/m to give you an idea) and we actually care and like to implement on the customer feedback we receive. If you end up trying it, never hesitate to reach out to our team, more than happy to help!