The best site to find out what the mining profitability was in the past is to go to,
https://bitinfocharts.com/comparison/ethereum-mining_profitability.htmlThat chart shows the amount of profit made per day per 1MH/s. So as you can tell ETH was most profitable actually in early 2016 because back then the difficulty was much lower than it is today. And it was also much earlier to source GPUs.
You could of bought a second hand R9 280X for like $100 and that hashed at like 22MH/s and pulled 200 Watts. Now cards are more expensive, but only slightly faster and consume maybe half. However the profitability was much better back then that it is today.
22MH @200watt sucks mate, I will never invest money on such cards, why not gtx1060? This card can do 22MH @ 80watts which is still fair enough than that R9 280X, even if your electricity bill is cheap build reasonable rigs