The Edgerouter X had good specs for the time it was released but that was over 9 years ago at this point. I had to replace mine a few years ago because it didn't have the thruput for my 1Gbs internet connection.
Many modern consumer routers contain processors and memory which can easily handle Adguard Home. I have a GL.iNet MT-6000 with a MediaTek Filogic 830 processor which has 4 ARM A53 cores running at 2Ghz and offloads wifi and wired network packet processing from the cores. It also has 1GB of DDR4 memory. It has no problem handling Adguard home, my 1Gbs internet connection and gives me around 900Mbs of wirguard thruput.
Many modern consumer routers contain processors and memory which can easily handle Adguard Home. I have a GL.iNet MT-6000 with a MediaTek Filogic 830 processor which has 4 ARM A53 cores running at 2Ghz and offloads wifi and wired network packet processing from the cores. It also has 1GB of DDR4 memory. It has no problem handling Adguard home, my 1Gbs internet connection and gives me around 900Mbs of wirguard thruput.