Love your line of thoughts, that’s exactly what Tamura and Yacchan would be, angry dumb x angry dumb! They would make a good couple in another manga but Yaribu is surprisingly mature in its themes and how those are handled, so it is hard to see them together as Yacchan has developed quite a lot and Tamura is still the same cute horny dumb. So I totally agree with you, Yacchan and Toono are the best together!! I relate to Yacchan sm even though I am nothing like him. His struggle just feels so real and makes you want to root for him. And emotionally Toono and Yacchan seem to be in the same place, Kashima is a bit more mature even if he has his boyish side.
I agree with you! Also, I just simply like Yacchan so much from the beginning, then knowing he has that personality gap, I just think that's cute and makes him more interesting.
I get you that I also want to see Kashima finally doesn't have to give up on something he wants for other's sake, but I also want to see that Yacchan is being chosen and not like a second option being compared to Kashima. I hope there will be new character for Kashima, just because I hope Toono would end up with Yacchan.
I don't know what I just wrote, but you get me.

I love Yacchan sm but he is just as dumb as Toono!! Their dynamic is just angry dumb x happy dumb. I cannot handle him loosing Toono… So they have to be together. But story would make more sense if Kashima ends up with Toono? Bc then Kashima would not finally give up on what he wants… but I want Yacchan to be happy he’s such a baby!! Although I really like Yacchan with Tamura too. I hate to see the Tamura haters here so disappointed…