I pick "Getting worse"
You're not alone; I have the same feeling as yours.
I started using Genesys in 1999 (Genesys 5.1) and 'useful' replies from Support could be around 1999 to 2000.
After that up to now, it depends if you are lucky enough to have your SR (or called trouble-ticket in old days) assigned to experienced Support staff.
Am I being too tough on them?
A good point to think about; it is about relativity
Once one has learned Genesys skills and field experiences, he can be more demanding.
However, for experienced GCE, he will not issue SR unless the issue cannot be resolved by various attempts including Genesys knowledge-base searching, manual reading and testing.
These SRs are usually too tough for new Genesys Support who has no or little field experience.
My personal view point is that unqualified support (and unqualified SI delivery!) may make Genesys loss some businesses in small to medium size sites. In large enterprise sites, Genesys may still survive for a long period of time.
BTW, it seems that Support or Professional Server quality degrading occurs in many systems / areas; thus, not Genesys alone.