Unfortunately, MacBook displays are a little too well sealed to be able to work on them for things like replacing the LCD, digitizer or backlight. Given the amount of time that's passed, you're absolutely correct in assuming it's not going to fix itself, nor is there really anything you can do to alleviate the problem.
The only practical solution is to replace the entire display assembly, which given the amount you've already spent on a logic board, is going to be a somewhat expensive fix; the replacement sold here on iFixit is over $500 USD. You can probably find one on eBay, but generally it's going to be difficult to find complete assemblies made by aftermarket companies on sites like Amazon and AliExpress.
You'll have to do a cost vs. value analysis; is it worth putting in the extra money to have a good looking display, or do you want to live with it the way it is? Ultimately the decision is yours, but we'll be happy to help out if you decide you'd like to take a shot at repairing it. iFixit has you covered with a guide to show you how if that's what you decide.
MacBook Pro 15" Touch Bar Late 2016 Screen Replacement - iFixit Repair Guide
Good luck; let us know what you decide!