Lower than normal performance, with low resource utilization

I normally get 140+ fps in dota, but recently I rarely get over 100fps.
In the first screenshot I am running max graphics, at 2560×1440 164hz. GPU utilization sits around 70%, and CPU 30%, but my fps is rarely over 100.

In the second screenshot I changed my resolution to 1920×1080, and set a lot of the graphics presets to the lowest, and still barely get over 100fps, with resource utilization even lower. (Normally when I changed to 1920×1080 with max graphics it said I got 180+fps)

My Rig:

• GTX 1060 6gb
• AMD Ryzen 7 3700X
• 32GB DDR4-3200MHz RAM
• 165hz monitor

I made sure my dota maximum fps allowed is fine, and my monitors refresh rate is set to 165hz. Is there anything I can do to get dota to utilize more of my hardware and get better fps?

Screenshots