I have been using a 48" LG OLED TV as a monitor for about 2 years. I thought I would love it. But I hated it. Text looked horrible. I was going mad and then Google'd a bit to see if others hated it too. And found that they did. But luckily there are settings that can be changed to turn it into an excellent computer monitor. Once I changed the right settings, it was love. I have 3 monitors on my desk. 32" LG LEDs on the side, 48" OLED in the middle. All 4K. I love this setup. I do occasionally think about replacing the LEDs. I just need the OLED pricing to drop a little more.
How close are you sitting to those monitors?
What are those settings? I have the same TV as my monitor.