Most research doesn't support the idea that bisexual men are more accepted than gay or straight men. Below are a couple of examples.
Single Bisexual Men’s and Women’s Perceptions of Acceptance in the LGBTQ Community
https://www.tandfonline.com/doi/full/10.1080/00918369.2019.1618645#:~:text=Put simply, 69.1% of bisexual,at least “mostly accepted.”
69.1% of bisexual men and 82.6% of bisexual women felt that they were at least “mostly accepted” in the community. This is in contrast to the 90.8% of gay men and 92.7% of lesbian women who indicated that their own subgroup (i.e., gay men or lesbian women, respectively) was at least “mostly accepted.
An examination of attitudes toward bisexual people at the intersections of gender and race/ethnicity
An examination of attitudes toward bisexual people at the intersections of gender and race/ethnicity - PMC).
bisexuality is often perceived as an invalid and unstable sexual orientation, with bisexual people being stereotyped as being uncertain about their sexual orientation, sexually promiscuous, and unfaithful in relationships (
Burke & LaFrance, 2018).