Make your resume match what you want to talk about. That one job you worked three months and hated everyone and everything about it, don’t put it in your work history, or resume. Leave the months off and just put the year you worked as the date.
For 90% of jobs they don’t care other than you being semi qualified for the position.
If you are in a senior position or a degree requirement field like healthcare services or legal field that is different but if you working at Target, food services, retail or fast food, nobody is going to really care about it being real timeframes or not.