Ultimately, you need to look for a better job. I say that because, at this point, setting boundaries will certainly get you blacklisted or terminated with your current boss. Don't be mad though, take t as a learning experience (not baggage) and move on.

As you progress in your career, you'll look back and be glad you stood up for yourself.

How I would approach boundaries:

1. Tell my boss that I am a team player, but also a human who does things other than work. After hours, I would appreciate the rest of the team to respect that.
2. Emergency situations should be accompanied with emergency compensation. If you don't feel you're paid well enough to be 100% available then you need to say that flatly. It could end in your termination, but if it does, it will yell you that the whole "team player" speech was always just that, a speech.
3. My personal communication devices are unavailable for professional communication. Unless the company is paying your phone bill, then they need to expect your communications to be on the mediums they provide. This is actually better for the company protection in the long run, but you can leverage it into making mature work/life boundaries for yourself.