[eedijs]

SEMI DISAPPOINTED. Have to push each iem 20 times in my ear and it still barely stays in even with the smallest buds. Sounds okay, nothing "wow" about it. 100$ worth? Not sure.
 
Is there anything I can do about them falling out or did I just throw out 100$?

 

[suicidal_orange]

If you're not getting a good seal (you probably aren't if they fall out) they're not going to sound good.  Have you tried a bigger bud?  Other than that complys offer an improve fit but they cost and can alter the sound signature.
 
Also the FXD80 have carbon nanotube drivers which need a lot of burn in, so you should leave them playing for a while - mine were still changing after 100 hours (left playing music while smothered with a towel)

 

[eedijs]

I tried bigger buds, but that only makes harder to put them in. Even with the smallest I can't get a deep insertion, even if I do - they slowly slide out.

 

[suicidal_orange]

Well if them being harder to put in makes them stay in that's a good thing

 
If not it sounds like a good case for Comply tips or these (definitely comfortable, but they need replacing), or Proguard Earportz (not comfortable for everyone, but don't need replacing) but you should try and hold them in properly for a while to ensure you like the sound before spending more on them.