uumm what. steam is NOT deciding it was distribution rights because of their Software Distribution Agreement that you as a publisher have to agree to first. if steam was then how can Deep Silver even possibly pull metro exodus from steam, if as you said, steam "decided" it has distribution rights?
Soo Steam doesn't advertise, except when it advertises, but if it does, its fine because there's "no damages to steam". right. sure.
What about Metro Exodus, you know, that game that was advertised by Steam and its publisher Deep Silver, that was pulled at the last second, and that has only 200k purchases on steam?
But its fine, because steam suffered no damages from missing out on the apparently 5 million purchases* that the epic store got instead. but yes, no damages at all. </sarcasm>
Deep Silver made a agreement with Steam that in no uncertain terms states not to release on another platform at the disadvantage of Steam. if you are going to disadvantage Steam, don't sign up with Steam until your ready. Deep Silver used Steam to advertise a game, then basically spat in Steam's face, and as a result are going against it's agreement with Steam. if they don't like the terms, then they should not have agreed to them.
*: the exact sales number is not publicly known, however Deep Silver did state sales were 2.5x more then metro last light on steam, which also does not have sale statistics. steam-spy claims that there are currently 2 to 5 million owners of metro last light redux, so going very conservative and picking 2 million, the result is a estimate of 5 million.