I wouldn't call Bloom Into You overrated. My issue with it is more that while it's very well executed, it still only tells a very typical story I read many times before, so despite it nuance, I lost my interest in reading it. I really wish it would go different route and explore some new grounds, while still being as well written as it's now. And yes, I'm fully aware it all boils down to me setting some expectations and story not meeting them. I'm sure I'll enjoy it when I feel like reading that kind of generic plot again.
When I first saw this manga I wasn't so into it because I thought it was a weird plot that might have some "het" tag later. When I saw it was going to get an anime version I gave it another shot and I was pleasantly surprised with the writing and development of their relationship. I think it was ground breaking to me, how you see Yuu and everyone evolve. I am so excited for the stage!