I was using a 1070 just a few years ago. I also felt the performance lack, but it wasn't just the card. The entire PC was old, with old CPU and DDR-3. I wonder how the 1070 would hold up on my current DDR-5 based computer. I would have swapped out for testing purposes, but I don't want to install and setup Nvidia driver. I'm on Linux and the modern Open Source drivers only support starting with RTX 20xx series.
Those Pascal series was the best graphics card I ever had.