I admit that BCH and BSV are far more profitable than Ethereum. but only for the beginning of the year until now. Many people get profits from both. Better you are patient. Don't sell the Ethereum that you have. If As you said, if the price of bitcoin does not up, ethereum prices do not up, then when bitcoin prices go high after halving, ethereum prices too will go high.
in terms of technology I think Ethereum Lah is superior, but for the price of Ethereum it hasn't been able to be good for 2 years, rest assured someday Ethereum can recover