ETH and Tron fee are nothing different, actually Bitcoin fee is way more cheaper even though it's decentralized and has huge volume.
Maybe that depends on the platform or exchange used, dude. Because of my experience using the Trc20 network, it's fine. For example, when I use Binance using usdt-trc20, the fee is only around 1 dollar, but other exchanges like Bybit are around 1.6 dollars, and last month it was 2 dollars and it lessen 0.4 dollars so it became 1.6$.
Now, when it comes to Bitcoin, it's also cheap in my experience, but sending tokens using the Tron network—I haven't tried that yet, you're already saying that. What's okay with me is when I do the conversion of crypto to fiat, so I said that it's okay so far for me.