roll over and play dead
To submit, acquiesce, or comply (to or with something) without any action, resistance, or protest. An allusion to a particular behavior in which certain animals feign death as a defense mechanism when faced with the threat of a predator. You can't just roll over and play dead every time they try to take advantage of you like that. You need to stand up for yourself! I know it can feel like your only option is to roll over and play dead when life gets so stressful, but you've got to do your best to improve your situation.
roll over and play dead
Fig. to just give up and be unable to cope with life or a problem. Why can't I complain about this? Am I supposed to roll over and play dead?