I use the Quilter's Select mat and Quilter's Select rotary cutter. 45m. The mat has a thin layer of memory foam that makes cutting very smooth. The rotary cutter is weighted so not much pressure is needed to push down to cut. I have used about every brand of cutter on the market over the years and for my hands now this one is best for me. If your mat is old, it's done for. May look okay but it is dried out and deteriorated. Lots of good ones to choose from that are made for rotary blades and not art tools.
One odd thing about mats. At a sew day we had a mat on a big wood table. Not one rotary cutter would cut fabric, We all tried. We moved the mat to a different table and no problem cutting at all. We never figured that out.