I've been using usb-c for a few years on all my critical devices (phone, computer , tablet, raspi) and in all possible situations (car, desk, night stand, power bank) and never had an issue with the connector.
I'm sure it happens to some people but it can't be a big issue or I (as the "IT-guy") would have heard about it.
Currently my phone charges mostly with the second notebook charger I got from work or one of those cheapish Anker PD bricks.