How about working on your communication with your boss?
You said you had to leave at 5PM, did you leave at 5PM everyday for an entire week? Did you let your immediate manager know you would be leaving at 5PM because of personal issues?
Did you ask what hours were expected of you as an employee?
There could be a lot of reasons why your manager is treating you this way, perhaps he heard from someone that you worked with previously that you were not dedicated? The easiest way to resolve this is to sit down and have a open conversation about expectations on both sides. After that conversation you can both make clear decisions about whether or not its a good fit (though don't say thats the purpose of the conversation).
You said you had to leave at 5PM, did you leave at 5PM everyday for an entire week? Did you let your immediate manager know you would be leaving at 5PM because of personal issues?
Did you ask what hours were expected of you as an employee?
There could be a lot of reasons why your manager is treating you this way, perhaps he heard from someone that you worked with previously that you were not dedicated? The easiest way to resolve this is to sit down and have a open conversation about expectations on both sides. After that conversation you can both make clear decisions about whether or not its a good fit (though don't say thats the purpose of the conversation).