Don't stop and never let go. Elite athletes might not hit a PR for months, if not years, and when they do, it's not a substantial increase. Does this deter them? NO. It motivates them to keep pushing, to keep training, and to keep their eye on the prize and work towards improvement.
Being patient is especially true with technical movements such as the snatch and the clean & jerk. When it comes to learning or perfecting these lifts, don't expect to nail it the first time. Neurologically, your body needs time to adjust to the new movements. For some, it may take longer than others, and that's fine. When being coached, don't be frustrated if it's not clicking right away. Be patient, don't let go and keep moving forward!