Clean also depends partially on interpretation.
1000 complaints certainly look like a problem unless you also consider the source and the resolution applied to those complaints.
No company that’s been in business for any length of time will ever have a spotless record.
Just as no politician will ever satisfy everyone who voted for him/her.
Sometimes the consumer needs to be a detective.
Part of being a consumer also means you need to understand the meaning of “caveat emptor” 