Which camera? The OP was for the SL2.
They rarely *remove" raw support, but I will tell you that with my XS no software (including DPP!) could read the RAWS created with RAW+JPEG. RAWS saved with RAW only were fine.
"I quit using Lightroom and starting using free software. The software that came with my camera, Gimp and Rawtherapee,"
As long as you are not a professional, using free or really any post editor is perfectly fine. Use what works for you.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM