I don't think a serve and volley dominated match on grass should be pointed out for if you're going to use the winner-unforced error ratio as a main argument for it being high-quality (which isn't suggesting it wasn't), but typically these sorts of matches have a very positive ratio.
For example when Stakhovsky upset Federer in 2013, the winner-unforced error ratios were 72 winners: 17 unforced errors for Stak, and 57 winners: 13 unforced errors for Fed. That's insane if you read it on paper.
You are obviously right. long matches against big servers or serve & volley players are very likely to produce these kind of stats, because there aren't many unforced errors due to the agressiveness of the game, mostly are forced. And obviously there will be a lot of easy winners in those matches.
Nothing new, OP just showing again his lack of tennis knowledge, not the first time he states having a great W-L ratio against a bot/S&V is something spetacular.
Four of the five best slam matches of the year happened in the Australian Open imho:
Dimitrov vs. Nadal
Federer vs. Nishikori
Federer vs. Nadal
Djokovic vs. Istomin
Add to that list Schwartzman vs. Djokovic in RG and it's my top 5 (regarding to the quality of tennis played).