Yeah his view on Ivermectin is a bit off but tbf he usually corrects himself when he gets things wrong, which is more than a lot do.
Ivermectin has been used successfully as a treatment though. It's obviously not a sure fire answer but I don't think a classification of any link to it as 'misinformation' is healthy because it's just another drug that is potentially on the table to treat COVID.
And look at the page you linked even.
In November 2021, Campbell made false claims about the use of the antiparasitic drug ivermectin as a COVID-19 treatment.[3] A few weeks later, another widely-viewed video of his was used by anti-vaccination activists to support the misinformation that COVID vaccines cause widespread heart attacks, which he had not said.[4]
Him putting a video out there that others then use and lie about isn't on him is it.
The coverage of Ivermectin in some media outlets has been as irresponsible as saying it is definitely the solution. It isn't just a horse de-wormer ffs and saying that is really dangerous and shames people. Which is mad. But it's a media problem. CNN were dreadful for it and rightly called out.