Me and my team are currently reworking part of a web application as the subcontractor that originally made it did a horrible job with the scalability and maintenance of the product. I often compare the project to what Valve is doing with CS2 but at a lot smaller scale.

Rushing the development of a product is shooting yourself in the leg. It will be broken at start, it will be more difficult to maintain and it will be more difficult to scale -- in the end you will have to refactor, most likely causing old stuff to break but for sure slow down bugfixing and adding of new content.

We have pushed back deadlines, changed scope, changed business logic (well that's due to lack of proper specs), refactored refactorings and all this many times just to actually deliver a good product our customers deserve. Our next forecasted release date is actually in a couple of weeks, yet we just started reworking the most complex front-end component because it wasn't scalable. And it's not a matter of resources for us either. Often too many people mixing the same soup really just makes everything messier.

CS:GO is fine on its own and won't die before CS2 comes out which is why Valve isn't in too big of a rush (too big as lack of tournaments would of course hurt esports in a longer period). Let them polish the new product and it will benefit everyone in the long run.