Now you need a subscription to keep using your tool? You need permanent Internet access, to keep using your tool? You need t keep paying to access you files?
This is why Affinity Photo will probably end up taking more and more market share away from Adobe's products.
If you don't like it, keep using your old version under the old licence.
In most jurisdictions, buying a copy of Photoshop is the purchase of a good.
This may be how you wish things were, but not how they actually are.
Read any software licence and see what you are actually getting for your money.
You can try to find old licenses for CS6, sure, but at some point, but it's a very different purchase and licensing system from what they have now.
A typical proprietary software licence text is irrelevant when it comes to terms of ownership, transfer of ownership, use of the good etc. as the law applies and determines "how [things] actually are". A contract, let alone a unilaterally dictated licence text, is legally unable to take away certain rights the consumer enjoys.