Why do you say that?? Flux CCX and XHV give me pretty good rewards from the 3060 that i use
also all of those coins to me seem like they have a lot of potential
The only reason profit is higher than ETH or comparable to ETH on the other coins is because they're competing with ETH to attract hashrate. When ETH goes PoS, 95% of the mining rewards available for GPU's will disappear. Millions of video cards will be competing for the 5% of the block rewards that remain. Difficulty will skyrocket on the other GPU coins, so profit will crash, leading most operators to liquidate their rigs at well below MSRP. This already happened in late 2018.
Difficulty will skyrocket when people can't even pay for electricity bill anymore? Many rigs will go offline that's a certainty, who would keep mining if a 300$ gpu is giving you 0.4$ per day? Many won't be able to settle electricity bill aside they will sell GPU at loss.