Upgrading from a 1050 to a 1050Ti is a waste of money, it's a minimal upgrade.
The CPU is not at issue (except maybe some specifically CPU intensive games). Given your monitor specs, your GPU very underpowered. A GTX 1070 is considered what you might need for max details at your monitor's resolution, but to average about 60fps. Given the high refresh rate, assuming you WANT higher frames per second, I would not buy a new video card until you have enough to at least go up to a GTX1080/RTX2070