Just started a new job last week. Ive been in the industry for 3 years so not completely junior but getting in to a new codebase is always rough. Especially when only 1 huge library file is documented, every component is cluttered af and most variables and parameter names are 1 character long.
Doesnt help that functions are 100 lines either when each the parameter names makes the logic incomprehensible.
Same at my new place, i tend to take a shorter lunch and leave earlier, i usually get into office at 8am or slightly before