Weird blur/ghosting effect on text help plz:(

[LunaMoo]

Practically none of the above matters and some of the suggestions might even introduce artifacts/incorrect pixel size etc. especially in games ported from older generation like this one.
As [Unknown] said, it's just an extremely low res texture.

Upscaling algorithms doesn't look nice on fonts neither on most more detailed content really and the only way to really make it nice and sharp is to replace the texture completely with a higher definition one. Look into texture replacement feature of PPSSPP which can change:
   
into:
   
This is however a manual process which has to be done per-game, it will never be automatic, might take lots of time and in some cases artistic skills.