These are classic mismanagement patterns. It's their responsibility not to leave feedback until it matures into surprise on your side or resentment on both sides. Eventually, it becomes your problem though. So, ask for feedback frequently. “You should try harder.” is not a good feedback. What are you supposed to do exactly? Ask for actionable feedback. Ask them to exemplify what you could have done differently in a certain situation, for instance.
More importantly, always be looking for a job. Your moves are restricted by your BATNA (best alternative to a negotiated agreement). More alternatives mean more leverage.
More importantly, always be looking for a job. Your moves are restricted by your BATNA (best alternative to a negotiated agreement). More alternatives mean more leverage.