New hires are like the runt of the litter; small, without confidence, and in need of some extra assistance. Bosses often underestimate new hires, under the assumption that they should be grateful to have a job, and should want to contribute and 'take one for the team' until they reach emotional burnout. In this case, OP began working in a short-staffed office. The person training OP ended up quitting, which only caused further problems for OP, who was already picking up a lot of slack. Their bo…