"This is sad and in my opinion companies like this are bad users of FOSS."

It might be 'sad' to you, but it's the only reason FOSS has gotten so popular in the last 10 years. When a company gets large enough and depends on it enough, they will hire developers to actually fix and contribute to FOSS. With almost all major projects, this is the case.

"It's really depressing to hear things like this and I feel I'm doing a disservice to the FOSS community for working at shitty companies like this even though I depend on the job to pay my bills."

How is it 'shitty'? FOSS is free. Which means the freedom to use it and not contribute back. It's pretty shitty to put the blame on them for not giving back to the community.

Also, they are paying you to work there.