Promoted to b4, still on the same massive win streak that got me out of b5 from 0 lp and feels just

I lost slot of games after placements. Probably 20-30 games. About a week ago, I started a massive win streak (ranked) and it's still going. I t took me 7 games in a row to get out of b5 which just happened today. I played a b4 game and still matched with b5 mostly and only one other b4 on the other team. Thought it would be a mix but nope. That bring the win streak to 8. Feels just as EZ. I'm 20-30. According to na.op.gg, my mmr is above average for my league. So y is so much b5. Watch it follow me well into silver if I get there.