I hate when the plot of a manga is explained in a single panel for no reason.

For example when two characters talk to each other and they reveal their plan to the audience like it’s normal that they just talk about their plan every day like a rehearsal. Maybe give out tiny bits of informations during their conversation so you dan guess in your own and later on reveal the plot through characters going through files or something. It just throws me off when characters dump the plot conveniently at unexpected times.