Heya! a lot of the insect depictions comes down to describing the main character as being chitinous, or leaving his pupa (the mc which you only see depicted as abstract scribbles or hands in 1st person POV) as well as small illustrations in each of the endings. there is a single mention of roaches if you look decide to look into the mirror, but it can be skipped entirely if you wish. The only roach imagery in the entire game is in the ending card in ending 3. I highly suggest you avoid that ending for that reason. Please don't feel pressured to play if it makes you uncomfy (the warnings are there for a reason after all ^^), but I hope this detailed explanation might help you decide!
i hope this helps! ^^