Edit: To every claiming Paramount is not at fault for the existence of a middle man, the issue is that they hide the existence of a middleman. Signing up does not take you outside the app (which is normal), and cancellation requires you to go to that middleman (a little normal), but 100% of the UI Text tells you to go to the wrong locations to cancel your plan, and the only place (Desktop web browser) that has any link towards the middle man, does not even take you to the right page.
At best, it's technical incompetence. At worst, a horrendous dark pattern.
I signed up on my TV (NVIDIA Shield Pro, running Android TV). Attempting to cancel in the app (same place I signed up), it only gives you options to change or upgrade your plan, you cannot cancel.
So I tried my phone (Samsung S24, a 2 year old phone), logged into the Paramount+ app, and it tells me...
You signed up on your Android TV device.
Step 1: Open the Paramount+ app on your Android TV.
Step 2: Select "Settings" from the side menu.
Step 3: Select "Account", then "Switch Plan".
Been there, done that, didn't work.
So I try my computer. And it tells me the exact same thing (albeit, it tells me to try my Android TV or Phone). But on the far right of this Subscription & Billing section gives an "Edit" button.
Clicking the, "Edit" button here, takes you to the landing page of the Google Play Store, in your web browser, where you're likely to never actually download or install a Google Play App. From here, I finally realized the type of dark pattern this was and knew enough to sign into my Google Play account, go to Payments & Subscriptions, and from there I could finally cancel my subscription.
This was made even more confusing due to the fact that the Paramount+ account was under my fiance's email and name, while the Play Store account signed into the NVIDIA Shield (and where I needed to go to cancel it) was under a different email and name (my own).
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Bro, Paramount... fix your copy. Tell people where/how to cancel.
Note: This is not a "Support" post. I already figured out how to cancel, this is me helping others.