When you reset something, you try to make it better. But if you do it too often, you may end up with a mess that you can not improve any longer. Keep that in mind. The motivation of the main character here is relatable, but you may find yourself shaking your head more than once, looking at the direction the movie takes.
Time travel movies have problems and they are not easy to write. Also if you are too impatient, you may have expectations that the movie cannot fulfill. Having said that, this movie is entertaining enough and has enough suspense for you not to care about certain things. While it also delivers impossible stunts from a woman that is a scientist first ... but maybe was a warrior in her previous life. Again try not to overthink it ... and those are the obvious things you can pick out. Just watch it and enjoy it for the romp that it is ...