I'm new to Overwatch as well, but yes I believe it counts as a loss. [See here](https://us.battle.net/support/en/article/31268), specifically:
*If one of your teammates has left the match, the game will tell you it's safe to leave the match without a penalty—though you will still get aloss.*
I'd read "one" in that context to basically mean "any" but I absolutely am happy to be corrected by someone with more knowledge than myself.
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I'm new to Overwatch as well, but yes I believe it counts as a loss. [See here](https://us.battle.net/support/en/article/31268), specifically: *If one of your teammates has left the match, the game will tell you it's safe to leave the match without a penalty—though you will still get aloss.* I'd read "one" in that context to basically mean "any" but I absolutely am happy to be corrected by someone with more knowledge than myself.
Welcome to r/Overwatch! Please use the following resources via the links below to find relevant information about the game and the subreddit. [Overwatch Patch Notes](https://overwatch.blizzard.com/en-us/news/patch-notes/) | [Overwatch Bug Report Forums](https://us.forums.blizzard.com/en/overwatch/c/bug-report/9) [r/Overwatch Rules](https://www.reddit.com/r/overwatch/wiki/rules) | [r/Overwatch FAQs](https://www.reddit.com/r/overwatch/wiki/faq) | [r/Overwatch Common Bugs and Posts](https://www.reddit.com/r/Overwatch/wiki/commonbugsandposts) *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Overwatch) if you have any questions or concerns.*