Neglect by children. And Also violence with adults and kids . Also kids being abusive towards other kids. Principal harrases and push Crumble down the stairs
A main character also has scars across his face and chest which look like the result of fire or acid. Another character, shown very briefly, explicitly states that her facial scar is the result of fire.
No, but a character sleeps with someone after having (to the audience, not his partner) promised his fidelity. His partner is upset by this despite them not actually being in a relationship.
It is suggested that the radiation from the nukes has caused cancer in all of the survivors, though this claim is not definitive and it is not brought up again.
Episode 1, there is a joke about a character having a "ridiculous" gender identity, obviously meant as a jab towards people with unconventional gender identities. It's brief, but can still be upsetting.
in the beginning of ep.4 the young girl (Angelica) calls the gay character gay and retarted (its meant in a funny way but might still be triggering)
also the beginning of ep 5 there is racism towards Asian people
(statutory) rape is shown in ep 4 its a 15 year old girl and a 19(?) year old it was --technically-- consensual but the age difference is what gets it. and the beginning of ep5 nothing is shown but it is implied
No, but it very blatantly sets up for a season 2 which will never happen (it was cancelled soon after season 1's release). It's not exactly a cliffhanger, but it leaves a lot to be desired.