Sure, but few orgs have as much surface area with such a ridiculously bad service. And I said subconsciously. I really doubt anyone would deliberately refuse to hire a good candidate because they worked for a company with shit customer service. But our thought processes are influenced a whole lot more by subconscious factors than we like to think they are. People that think their thought process is entirely logical and deliberate usually just lack the introspection to see how wrong they are. It's basically the core tenet of modern advertising.
Honestly, telecommunications companies in general are considered to have bad service.
I worked for a large telco for many years with a lot of history and people honestly hated the company, even if they came in store and had a flawless experience many of them couldn't be curbed.
You have everyday people using mobile and internet services that operate in the background that impact people heavily if they go down or their experience is poor. Then the process for them to get it remediated is speaking with service staff that often don't have the ability to actually fix the problem if it is infrastructure related.
Especially when internet services and speeds around a decade ago were/are struggling to keep up with basic internet usage.
As an employee I had gone above and beyond for many customers and had experienced some crazy stories where the customer was simply horrible.