Life protip - probation period goes both ways. If within 2 weeks you know that ur boss/colleague/firm is fk up, just start applying around (in your CV say available immediately) then throw letter when you get a new job.

Don't waste time ai mai ai mai pang chance then end up stuck in a fk up place for 1 year. Fk up ppl/firm will always be fk up, no need pai seh, take your talents elsewhere.