Mailchimp has persistent 2FA problems where SMS authentication stops working without any fallback method, and support agents dismiss the issue.

Email marketing campaigns are being flagged as phishing/malware due to Mailchimp's tracking links, damaging deliverability and reputation.

Mailchimp's interface is clunky and outdated, and there's misleading information about Canva integration that caused wasted effort redesigning a newsletter.

Copying and pasting content into Constant Contact campaigns requires extensive manual reformatting because text formatting (color, font size, spacing, font) gets corrupted during the paste process.

Salesforce enables spam emails and has unspecified issues that frustrate the user.

ActiveCampaign makes it difficult to share campaign links on social media and lacks an undo/back button, forcing users to manually save frequently to avoid losing work.