I mean this with all seriousness and absolutely no sarcasm....
You have complained about your lack of effective union representation. Have you called your local Union hall to voice your concerns? And would you consider becoming a shop steward yourself? It sounds like you have the willingness to stand up for yourself, as well as a genuine concern for the well-being of your co-workers. That's 90% of what it takes to be an effective steward right there.
Finally some positive input.
You see this is the type of stuff I look to find here.
Such things are no longer mediated or proactively sought out in my building.
Sometimes I think that place is about 5% UPS the rest is some kind of thrown together ghetto warehouse.
Teamsters have no voice in that building, only people from United Way show up to beg for money.
No one has ever organized a single thing to inform us about union issues...well except when someone was stealing prescriptions and lottery tickets...that was the only time in 4 years when the Union steward stood up and talked to us as a group.
I should look into this, could be a way out of the boxes and into the paper work, hahaha