Why does anyone want a smart TV at all or any other device? Almost everyone I know has an old tablet or laptop that they don't use at home. Get a dumb tv / projector (or even a smart tv but don't connect it to your network and use its smart features), plug the old laptop/tablet in using HDMI and use a bluetooth keyboard with a trackpad as a remote. You get everything you want with it - browser to login and watch whatever you want to, much much better experience typing in login/passwords than your tv remote, install whatever adblocks/security software you want. Added bonus, instead of buying another device you'd be using an old laptop/tablet you'd discard otherwise.