Its not very realistic but in E4, Victor gets "spaghettified" as he goes out to fix the Loom. It shows his body dissolving in strands and you can see some red strands and muscles and his ribcage, but there is no gore or liquid blood. Its very sci-fi.
Not shown on screen but there is mention about how he vacuum of outer space can tear off someone's skin and the mention of how a body can 'spaghettify' if put into a black hole
In E4 about 25 mins in (like halfway through) when Ravonna and Miss Minutes are in the cell with Brad, you can hear slight crunching and gross sounds as the prisoners are being crushed in the box. It doesnt last too long and after you can hear some water dripping but it is not clear if it is blood or not.
in Episode 2, X-5 struggles to breathe a bit when he is enclosed in a box (see is there a claustrophobic scene) but is released unharmed. In Episode 4 lots of TVA variants also struggle to breathe im the same enclosing box. They are not shown struggling but you can hear it.
E2: Loki interrogates Brad/X-5 by putting him in a holographic box that he can push a button to shrink it. It gets smaller and smaller and Brad/X-5 is shown struggling as the walls close in around him. However he finally tells Loki the information he needs and Loki frees him unharmed E4: multiple TVA prisoners are locked inside the same box from episode 2 and crushed to death as the box closes in around them.
Kind of, there is a lot of talk about "timelines" and different realities and the past, present and future. The show also jumps back in forth in different time periods
There is a character named Ourobouros (or O.B) like the snake circle symbol, but no snakes are shown in the show and it is not clear if this is what his name is referring to
Brad/X-5 reminds B-15 and Mobius that they were once real people with real lives until they were captured and taken to the TVA and had their memories wiped
There is an ongoing joke in e1 where O.B tells Mobius that going in to fix the Loom isnt safe and it may tear his skin off, but it's not too graphic and Mobius ends up being unharmed