Considering how similar Frontier is to other internet providers, it's difficult to understand why the company consistently ranks so low for customer satisfaction, but the numbers don't lie.
For two consecutive years, the American Customer Satisfaction Index ranked Frontier Communications at the bottom for customer satisfaction with a score of 55 out of 100. For reference, the average of all providers was a 64 and the next lowest provider in 2020 was Suddenlink with a 57. In 2018, Frontier finished in the next-to-last spot with a 54 compared to Mediacom's 53. The year prior, Frontier was last among all providers with a 56.
Spokesman's statement says that Frontier is optimistic that customer satisfaction will improve. Article: https://www.cnet.com/home/internet/frontier-internet-review/