@gman calling them parasites is a brilliant move and the name of your account is the cherry on top.
@boyfalldown there are multiple things here. I would first of all get a password manager, change Netflix password, change password of associated email account and the secret questions. Do not under any circumstances reuse passwords between accounts/subscriptions you have. where you can always use Two Factor Authentication, via your phone is fine, using a separate single better. Don’t save passwords on your browser when promoted, delete the ones already saved if any. Disable auto login, I would rather log in every time to websites where my card details are held, should be quick with password managers.
Do not use a public WiFi network, if you must then use a VPN, preferably use it all the time. If you are predominantly using a PC, separate accounts for you and others using the computer, I suggest running a scan of your PC to ensure you don’t have key loggers or a virus on there.
On the browser front, use Brave and turn on the shields to block tracking. I find it the least intrusive of all browsers and does a good job protecting you from various cookies, ad trackers and other potential nasties.
Long answer but I’m pointing out everything I would personally do. You may already be doing some of these things which should save you some effort.