in my experience, large orgs are where it's at. more redundancy, more workers per boss, more "bosses" with less institutional power / buy-in, more of a culture of trying to avoid turnover rather than boundary less toxicity to drive away troublemakers.
shitty shit can still totally happen in larger orgs for sure, but some of the most toxic shit I've ever seen was in little orgs where there's no HR, steward or ombud to act as a check on a bad boss by reminding them how much a lawyer costs per hour and how it'll turn the bean counters against them.