Hi Andrew,
For me, the HackRF was the one that didn't work well with SDR# / IF Average.
SDR# offers only sample rates of 8, 10, 12.5, 16, and 20 MSPS for it, and it does not provide any decimation options, even though the HackRF hardware itself supports sample rates ranging from 2 to 20 MSPS. I use 2.4 MSPS in my pipeline for HackRF.
https://hackrf.readthedocs.io/en/latest/hackrf_one.html
Thanks.
Here are the HackRF results with my smaller dish at a high RFI place: https://groups.google.com/u/1/g/sara-list/c/naoVzS8b71g/m/gHlTccWJCQAJ