It isn't some herculean task unless you have bad social anxiety. Mentioning it at the customer service desk as you walk in to do your shopping is probably less effort than taking a picture and posting it here.
Standing up for disabled people is being a Karen? But more importantly... If you believe it why did you start this out by calling bullshit on people saying they did things about this?
Start with why you think it's being a Karen to make sure parking spots for the disabled stay only for the disabled. I'd like to hear in detail that opinion of yours. Then we can move on to the inconsistencies in your story.