me reading ichinose at the beginning: okay
me realizing which ichinose that was: NOOOOOOO
on a serious note, the ending wasn't as bad as i thought it would be, and although im kinda disappointed about masumi (im a lesbian alright), hey, the more bisexual rep we have in these mediums, the better! definitely the ending didn't take from it how good of a manga it was, and considering this is SHONEN jump, it did the job really well.
also, like other people have said, it was never explicitly shown or said that taichi was exclusively sexually attracted to females, and it was explored many many times, with both futaba AND touma, that friendship and romantic love can at times be tricky and well, both of them are important people for taichi. did it feel rushed? yes, but not because taichi was made bi or gay all of a sudden, but because we weren't really told how that appreciation and platonic love he had for touma turned into romantic love to the point that they get married. we were just told off screen of moments that were ESSENTIAL to the ending, without which we wouldn't really understand it since the ending is set in a different time, space and context that the one we saw through the manga and became to understand well. just knowing that they happened is not enough for us to totally understand the ending and these adult versions of the characters.
but like a friend said, this was most probably a test run to see what the reception would be for the shonen demographic of such themes, and the themes addressed in the manga are still very important and i hope we can see more stories that are not so blatantly yaoi or yuri but more like a coming of age story about serious issues.