Toxic and demoralizing work environment and colleagues, should I hang on to this job?

I'm 26 (F), and it is my 2nd full-time job. I did a switch of field and hence I am considered a fresh and new employee working in the HR field. The pay of my current job is slightly higher than average and this one of the practical reason why I am hanging on. On my first week of work, I was getting little guidance at work, yet was overloaded with tons of administrative tasks to do, each of which was labelled as urgent. During the interview, I was being told that there will be fair balance between the fun and boring stuffs and that the colleagues here are very family oriented, however when I spoke up about how overwhelmed I felt, my feedback was not taken seriously. One of the higher management staff even asked if i am ready to tender. The working hours can hit up to 14 or 16 hours per day, including weekends and when I asked about whether there will be any time compensation or overtime pay, I was told that there's none. It's also toxic how people here are sending emails after 1AM.

I spoke to few other managers for advice, and none gave me a reasonable advice on how to proceed with doing my job. It is really difficult as everyday I fear of opening up my emails and receiving scoldings that is degrading. I thought that HR personnel would practise more empathy towards people, however I was wrong. I am experiencing anxiety before work everyday, fearing if I will get reprimanded or scolded for what I did or did not do.

I am over 2 weeks into this job now, and never have I felt so jaded and anxious about a job. Initially I wanted a job that doesn't make me want to drag my feet to work everyday yet I landed myself this shitty job that is totally opposite of what I wanted. I am in a dilemma now, should I hang in there until I at least get another job opportunity in this poor economy situation due to Covid-19, or should I tender?

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