There's a lot of factors to be consider aside from the traffic in the network.
As far as i know ETH team tries to solve this problem since then but they still failed because every time the market pumps and the traffic pumps, the fees also follows which is not a good sign in a blockchain technology. There's a lot of good alternatives honestly, but many still prefer ETH network for some reason, maybe they just have no choice since they are dealing with the token that is under the ETH network.