Why is it so hard to make much needed improvements to crypto tech?

I am no programmer and the most I know about computers is enough to use some work related programs and know how to install and play games.

For me (and judging by this sub for a lot of others) the most annoying thing is that every time I send crypto I am overthinking whether I sent it via correct network.

I have lost some money like this. Just by sending through wrong network. Why isnt there any feature yet to match automatically the network that recieving adress is from? Is that too hard to implement and if so, why?

The other thing would be solving the trilemma: Scalability, decentralisation and security. Is it true that no blockchain can have all three to a high level? Why is that so and why cant we solve it?

The more I research this space, the more questions open. There are a lot of things that I might not understand but do I really need to?