Christ, that's so bad getting a warning just for being honest! I know I sometimes rant about my workplace but I've never heard of anyone getting a warning for that. In fact, one of my colleagues once said -- and I quote -- "This project couldn't deliver a bleeping parcel". I just laughed as he was usually plain speaking and he was right on that occasion.This happened at my husband's old job. The MD (small business) employed a 'random' man into a management role that didn't previously exist. They had a different surname so for months, noone knew. Until someone found out the guy was the MD's son in law!! With no appropriate qualifications for the role He was hopeless (but never called out on it), and noone trusted him or the MD after that.
Ugh I feel for you. I got lumbered with written warning once for daring to mutter to a colleague about a project not working (it was a shambles). Apparently I was being negative and impacting morale. All I had done was utter an opinion to a colleague I thought felt the same but they effing shopped me. I managed to get it down to a verbal warning as they tried to skip several HR stages just to harass me. It would have been a different issue if I had shouted it to the whole room but it was literally only a frustrated whispered moan to a colleague after a very challenging day. I looked for a job after that. Workplaces need to allow for some feedback or allow employees to have a private moan with colleagues. We are human. Places that stamp on you for having a discreet opinion are the worst.
Pretty sure he'd have been frogmarched out the building if he worked at the same place as you!
Thing is, it's obvious when people are told off for "being negative" they know you've got a point. If they didn't agree, they'd take more of an interest as to why you felt that way.