Searx sucks for images in my experience, startpage was bought by an advertising company, brave is weird for a multitude of reasons but I don’t know how good their search engine is as I’ve never tried it
However I do think that finding a searx instance that works for you and then using another engine like ddg for images is the way to go… You could add a shortcut like “.ddg garbage truck” for easily searching with for example ddg on firefox