You forgot something.
Blocks reward.
1 year ago, ETH Block rewards is 4 ETH/Block.
But today, is decrease to 2 ETH/Block only.
And, 1 year ago, ETH Price is $1000, but today is only $250
But in spite of all this awful things people still mining ETH. May be they know something? Or may be they just are able to use a calculator? The last 3 years there were only about 5-6 months than all were happy. All another time someone mined and got profit and someone cried.
People who mined ETH coin when the price of ETH was 90$, are now in making some decent profit with the increase in the price of the ETH. So we should mine the coin when the market is in a downtrend which will help us to make a decent profit when they start increasing.