Ooof, I hear ya. I had a horrid time on a student film in NYC years ago and that put an end to my student film days. My advice for weeding out the bad seeds and finding those gems - if you’re union, that helps. You’re going to get treated better, taken care of, and have recourse to take if you’re not. However, before you are, I’d suggest imdb.com to do a quick scan on who the director, casting director, writer are etc are. See what they’ve done, if you’d care to be a part of that body of work. Avoid craigslist for acting. Avoid non-paying gigs. Do those only with your friends. Join a theater company as you’ll be plugged into a creative community that can vet others a bit. Network to grow your own (going to film fests, networking events, etc) and take control yourself and make your own content too - it’s an amazing time in that you can! It’s really not hard to learn all the skills, at least the basics, there are yt vids on them all : ) You can also work as a PA/crew for some sets to meet others/widen your circle. Dep on where your interests lie you can build out in that direction. But more than anything, stand up for yourself. There will ALWAYS be other roles, if something feels wrong or off say so. Don’t be afraid. Make your concerns and needs known. If they balk at simple respectful things they don’t deserve your talents.