I think the data is biased too much. It is not easy to beat r combat and GB with Y tempo in general. That’s why I put the words ‘in my opinion’ in front of good & bad list.
BR turtle is same as BR seven. there are some control-like decks and mid-range-like decks but I just put them into one category. BR turtle usually includes windfall, mochi, tortoise… etc. it is not OTK.
I think the most popular and strongest ramp decks are similar to this. https://imgur.com/oXKS2eZ (Frequent replacements: - stalkers + embraces, -1 whale +1 creation) Last 2 weeks I played yellow tempo a lot. I am not very skillful player and your win rate against GB ramp seems amazing. For me match-up against GB Ramp is very difficult(although GY sac is even worse). I won only if my opponents made rough mistakes or played not the strongest version of GB ramp. Also I feel that Yellow Tempo is small favorite against red combat.