Earlier quoted context omitted.
Used register.com since the 90s. They're so bad I switched 20+ domains to name.com. DO NOT USE web.com or register.com, they're fucking terrible.
Happy name customer with .io domains that roll over properly. I've used most of the big guys as well (including The Network Solutions).
In the last 5-10 years the issues started growing. Finally, I hit a wall and transferred everything off their service.
I now get spam emails of them trying to trick me into switching my domains back. The vitriol their helpdesk people receive is about as shitty as I get. Maybe they don't deserve it in their role, but hopefully the angry emails will get them to find a better job asap.