This transactional thought process is pervasive and a proven phenomenon by science: people settle for bad relationships for fear of being single. The greater their fear, the more they’ll downgrade. Then, they’ll claw to make the already-bad relationship work, all before realizing one can only chuck water out of a sinking boat for so long. Fundamental incompatibilities have one true destination.
I've seen countless friends of mine go through this. Not just back in college, but in professional life as well.