Unicode has metadata on each character that would allow software to easily strip out or normalize emoji's and "decorative" characters.

It might have edge case problems -- but the charcters in the OP's name would not be included.

Also, stripping out emoji's may not actually be required or the right solution. If security is the concern, Unicode also has recommended processes and algorithms for dealing with that.

https://www.unicode.org/reports/tr39/

We need better support for the functions developers actually need on unicode in more platforms and languages.

Global human language is complicated as a domain. Legacy issues in actually existing data adds to the complexity. Unicode does a pretty good job at it. It's actually pretty amazing how well it does. Including a lot more than just the character set, and encoding, but algorithms for various kinds of normalizing, sorting, indexing, under various localizations, etc.

It needs better support in the environments more developers are working in, with raised-to-the-top standard solutions for identified common use cases and problems, that can be implemented simply by calling a performance-optimized library function.

(And, if we really want to argue about emoji's, they seem to be extremely popular, and literally have effected global culture, because people want to use them? Blaming emoji's seems like blaming the user! Unicode's support for them actually supports interoperability and vendor-neutral standards for a thing that is wildly popular? but I actually don't think any of the problems or complexity we are talking about, including the OP's complaint, can or should be laid at the feet of emojis)