Not everything you start needs to be seen to completion.
Some tasks, projects, or even relationships are not worth the investment in time, energy, and attention they require.
Simply because you have invested in something does not mean it will pay off or that it is worth further investment.
But if it matters to you, if success in this endeavor is important and meaningful, you can not and you must not quit simply because it is difficult.
Setbacks, obstacles, and failure are not only part of the path to success in a worthwhile endeavor, they are the path to success.
For this reason, when you meet difficulty along the way, it is not a sign that you should stop or change course, but that you should keep going.
The way around is through.