I wholeheartedly disagree. Just because you think they meet the criteria doesn't make it true. What are the metrics on chrome web store usage that make you believe it meets the criteria? The figures I can see mentioned online would reflect only a minority of chrome users even using plugins.
I dont disagree with your thoughts on the chrome web store being unfair and anticompetitive, but the DMA is VERY specific in its reach. You can still approach them with complaints unrelated to the DMA of course - but if your complaint was "they should be a gatekeeper", then you will likely be out of luck.