You are way too wrong my dear and you are doing a wrong comparison. Bitcoin is currently holding ~0.8t usd of the all financial markets and comparing to other markets such as stocks and property with much more older markets and more people and investors knowing about them Bitcoin is not progressing slowly at all.
the idea of 21kk bitcoins is out of date, no fresh ideas, no fresh blood in devs. And also absolutely centralised infrastructure around (exchanges).
If you take a look in bitcoin's GitHub repository and check the "commits" part you will see the last changed made to the Bitcoin project and there is always at least 2-3 commits per day helping the project to increase the quality by the time. Also, you can choose to use the centralized exchanged they ask you the KYC or not. For me, Since I started using Bitcoin I never used centralized exchanges.