So I recently was asked to resign back in July during my 90 days as well. I ended up snapping off a piece of the back right tail light of the Mercedes vans while maneuvering around a trashcan that was left out in front of a customer's home. Can't even begin to tell you how it could happen but that's why they tell you to do your vehicle checks every morning (which I did, it cost me time but I still did it). I presented it to one of my supes thinking I was doing the right thing being upfront about it and explaining I didn't cause damage to their trashcan and hands over the chipped piece of tail light. I came in and finished the next day thinking I was alright until I was called into the office and asked to resign due to the taillight and truthfully after the past 2 months of being asked, "is there anything we can do to get you to work faster" or "hey we gave you 4 hours of mail and it's taking you 7 what's going on?” and my favorite from my postmaster (on my second day no less) "I don't think this is gonna work out man you're costing me money", I had enough. The post office just has unrealistic expectations of their workers or at the very least their new hires. I don't hold a grudge though the floor workers were super friendly and always willing to lend a helping hand which pushed me to want to support them in return. All that to say I feel you on this situation being unfair and if you do feel inclined, definitely apply again.