I don't think you're comparing apples to apples. Just looking at some simple data, COH2 has 3.7 million copies sold as of 2015 and was released in 2013. DoW has 500k sold and came out in 2017. Just a guess without seeing any financials but I would think COH2 has been somewhat successful, especially against DoW3.
You're not comparing apples with apples when CoH2 has 3,866,020 over 4 Years and 7 Months
https://steamspy.com/app/231430 vs DoW3 572,376 over 9 months
https://steamspy.com/app/285190
It's too bad you cant compare like for like on that site but its possible that the game may have reached the same number of sales had they actually supported the game.