Rom-com ending - the bully is gay or trans in the end
After-School Special ending - there are two bullies, one becomes friends with the LGBTQ+ kids and goes on to college, a well adjusted advocate and the other bully ramps up until he ends up in jail for accidentally killing a kid.
American ending - the bully ends up snapping, bringing his father's collection of semi-auto firearms to school and kills 20 people. The NRA and Conservatives circle the wagons and lift him up as a champion of CIS rights, have the LGBTQ+ friendly administration and school board fired, and every kid he bullied is seen in the final cut scene doing drugs in lower Philly as he walks by in a $3000 suit to his 500k/yr consulting job.