[jdbowman]

This sort of situation is complex, and painful. Please take care of yourself. If the culture is toxic, this job may not be the right fit.

If you want to stick it out in the hopes that a breakthrough is coming, perhaps you want to set goals or milestones. A time-based milestone could look like "I will give this three more months." A criteria-based one might be "I will continue if I receive some affirmation of my abilities this week." Of course, some combination of time and criteria is in order.

Advice falls short in such scenarios. I really hope you find meaning and growth at work, one way or another.