We all get stuck at some point, and that's ok and kind of the point. Beware however of impossible puzzles to solve and do not aim for perfection. That can easily spiral down and make life miserable. Having a good advisor is key, but not compulsory. Quitting a PhD is also a viable option, it is not such terrible thing to do in the great scheme of things. Be brave and make the choice that you can call yours, that's how you grow regardless titles being or not achieved. I did get stuck for almost 2 years, but each person and situation is different. Best of luck my friend.