> Most of all makes me sad because they seem to be prioritised on a higher level than some of the oldest written languages on the planet.

1. is there any evidence for that claim or are you just making things up as you go?

2. which scripts are specifically blocked because of emoji "being prioritised"?

Keep in mind, Unicode 9 includes 74 new emoji and 7227 non-emoji codepoints including 4 new scripts.