"Nefarious software"

When this appears on a website telling me to disable my Adblocker, I do not continue to the site. The fact the software still blocks access when you disable any adblocking software leads to this software causing websites to lose visitors. Something I doubt Getadmiral customers will be happy with.

"A horrible experience for privacy-conscious visitors to your website"

Admiral offers a truly horrible experience for privacy-conscious visitors to websites that use it's VRM technology.
In a lot of cases, Admiral offers no "Reject all" option when it comes to tracking and data sharing options.
It's list of "partners" is enormous, and gives a false sense of security because scrolling through the first half shows all of the toggles for sharing data as "off". However, if a visitor keeps scrolling (and this can take some time because there are so many), they will find a great many "Legitimate interest" toggles are on. There is no way to switch them all off in one go, so the visitor is forced to either spend a great deal of time scrolling through the list and switching the activated toggles off, or just give in and either accept them or leave the website.
I suspect a great many visitors will take the second option and just accept the settings, whether they like it or not, to be able to access the content. This is a horrible way to do business; it forces the visitor into a war of attrition, beating them down with the sheer weight of the task of clicking switches to protect their privacy.
I refuse to engage with any website if I see that they use Admiral's technology; I just close the page.
I have read reviews that suggest that, for the websites that buy into Admiral's products, their experience as a client is very good. But I would urge any prospective clients to consider the experience they are setting up for visitors to their websites because, in my experience, it is difficult and borderline hostile for visitors who want to have control over what data they share. There are other options that will not alienate your audience to this extent.

"Just bad"

Just bad. Default option is trying to get you subscribed to a lot of cookies to sell data

"Illegal malpractise around adsense"

Illegal malpractise around adsense

"I have disabled the adblocker as…"

I have disabled the adblocker as requested, but I am still getting requests to disable it thus rendering the originating website unusable.

They do not respond to emails

[I eventually heard from them 18 months later. They acknowledged that they need to do better. I have adjusted the rating to 3 stars. Hopefully, a corner is turned.]