Yeah, I wouldn’t say even 10, 15 straight losses is indicative of systemic changes within the game or community (though it is a fact a lot of the top of the ladder has been trimmed off, as hardcore players/HGC players have quit the game)
AZJackson made a forum post where he said he lost 16 ranked games in a row at the start of a season.
He is not just a random player or developer, he is a (high) Grand Master who has designed some of the heroes he’s playing and has intricate insider info of heroes and how they work.
Now imagine how far the rabbit hole could go for a regular gold player.
Any sample not counted in the thousands as far as wins/losses go is just random short term variance.
Like so many people here have already said over the years: Ranked is really nothing more than a grind.
Sometimes a very painful grind.
edit - added Jackson quote