The main cause of the rise of gas is the exchange of AMM swaps which usually require high gas for fast transactions, this makes eth unstable on transaction fees, I sometimes see it can drop to 20 and back up to above 300 even 500. this should be fixed as soon as possible, we all have the same problem, hopefully vitalik hear it.
But what I see and experience now is that the cost of Gas on the Ethereum platform is very cheap and stable, although there is a slight change in seconds, but the change is not too far from the previous figure.