The phrase "stuck with it" generally means you are dealing with an unwanted situation that you can't escape from. Sometimes, you need alternatives to articulate the same feeling in a more subtle way. So, here are some of the synonyms for "stuck with it" - endure, bear with, tolerate, persevere, soldier on, hang in there, keep at it, stay the course, come through, weather the storm, stand firm, see it through. Exercise caution while using them as the connotation of each may differ slightly, but all convey an underlying sense of resilience and determination in the face of adversity.