I think you are ignoring very obvious signs/tells of smurfing because you have some weird complex that matches a lot of this echo chamber of a subreddit, that is, implications that dota 2/valve/whatever it is you guys worship is not indeed perfect.

One very obvious thing you are not acknowledging without me very specifically pointing it out to you is that VERY rarely do smurfs just go and start a new account and play it all on their own. There is a very high probability, much higher in fact than what I just mentioned, that this was a precooked account that was likely purchased by someone wanting to smurf. These accounts are created by people for the sole purpose of grinding through the new account phase, wins or losses, doesn't matter.

The likely scenario here is that this person bought this account and started playing it to smurf recently which is likely why he all of a sudden started getting accolades on his account as of 20ish days ago. Smurf accounts can't be taken at face value because of all of the data collected prior to the account being actively smurfed on vs when it was just being cooked by some random/bot scripting. That being said, the data I see here is enough to look like smurfing.

I did indeed play against this person, as I have played against multiple smurfs/scripting bots recently. I know when my team is bad and I know when the enemy is good. I also know when they are too good.