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I removed the WiFi card from my LG TV before I first turned it on, it's been great since.

Apparently some TVs are bad at nagging about missing the hardware, so another suggestion would be to add a load or something to the antenna. I forgot what that's called, and at the time, couldn't really find any details online.

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It's literally called a dummy load - to the 'lectrics, it acts like an antenna, but it doesn't radiate or receive.

"dummy load", specifically "50 ohm dummy load", because that's the standard impedance of most antennae. (Oddly enough, the TV antenna is engineered for a 75-ohm impedance, but that's beside the point.)

However, even dummy loads radiate a little bit. It's common to test handheld radios a few feet from each other with dummy loads screwed onto the antenna ports, because when you've got 115dB of link margin and your dummy loads are only eating 50dB on each end, that's still plenty!

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