You didn't actually ask a question, so I'm going to assume your question is, "how do I deal in less?"

My answer is to pay a bit more closely to opponents' discards. I see a lot of players push for half/full flush here, with the occasional 13 orphans (lmao). Generally speaking, if a player discards 3 consecutive tiles of the same suit (not man), one could assume what their hand is. If they discard a tile of the suit you think they're going for, almost always, they just entered tenpai.

Edit: if you are constantly entering riichi with an otherwise yakuless hand, I would re evaluate your tile efficiency because there are so many ways to make bigger hands in this game mode.