It's called extreme pay2win :-)

I have been battling in the Gold League myself for many seasons now and have had similar win-streaks never really feeling it was because I played good but mostly due to opponents who are just way lower in card collection and levels. Splinterlands right now doesn't feel like a card game anymore and more like a boring reward grind where you earn 3 points on the leaderboard for a win and drop 30 points on a loss. The Devs really need to start putting their focus on making the game more fun and skill-based instead of doing everything they can just to make sure the economy doesn't collapse early.