That the company was absorbed by another company doesn't change the fact that it's still physically in operation and still doing business.
Same with anything. Competitors only benefit from the demise of a competitor if they actually cease operating. Simply getting a new owner but carrying on business means effectively nothing no matter what the industry.
It's not an ASX listed company anymore nor is it listed elsewhere. This is ASX forums. ASX stocks are discussed. It isn't one. Not anymore.
The other topic seems to be you having a battle with your own conscience about something irrelevant. I on the other hand am not.
I don't need to assess whether AGL is benefitting from another operators demise. It wouldn't in any case. Poor management will do that to a company. In any case you clearly are putting your foot in it. Iberdrola, which took out Infigen is a larger company than AGL. That isn't a positive in case you don't know that either.