I haven't been the disliked person (surely not universally liked but widely liked so far) but I have sort of disliked a couple of reasonably competent coworkers - so not disliked because they sucked or dragged us down - just personality clash - and I have learned to ignore it because it's not predictive of how well their work will get done.
Our IT department would listen to any ideas BTW, it's getting more corporate (I joined when it was a start up but it's been a dozen years) but not to the point of being heirarchish yet. I am sort of outspoken too and have found the wild west chaos of a startup to be my best fit, may have time to do it once more before retirement if this place gets too beaurocratic.


I work out in sleeveless tops.
Had a friend who swore by ammonia for armpit stains on shirts, maybe try that?