The linked article doesn't say the submitted driver code was awful. In fact, it says Paragon submitted the driver after Linus suggested they submit it.
What the article quotes Linus complaining about is a process issue. Paragon apparently used GitHub's GUI to merge some of their branches rather than the git CLI. Linus would prefer they use the CLI to merge branches because the GitHub GUI reportedly omits important metadata from merge commits, such as the developer email, and encourages uninformative commit messages.
What the article quotes Linus complaining about is a process issue. Paragon apparently used GitHub's GUI to merge some of their branches rather than the git CLI. Linus would prefer they use the CLI to merge branches because the GitHub GUI reportedly omits important metadata from merge commits, such as the developer email, and encourages uninformative commit messages.