First off I have seenn people who have been building for over 20 years every so often turn up junk and call it a work of art.
You have only been doing this like you said for about a year and what you have done has most definitly been a steady improvment compard what I have seen here and else where.
Even the guys who do all the shows and win awards turn up junk ever so often,so dont sweat it.
You keep going the way you are and try a new thing with each build before you know,you will have much to show for,so dont be ashamed or upset by your earlier progress,just keep trucking and building.
What I find usful is a model journel,In which I keep notes of what I have done so I will learn from my mistakes and how I can Improve from them.
When I first started for the first few kits I did nothing but build and after awhile I added a color or two,then a full painted kit,maybe some wiring,maybe some photoetch and resin add ons.
just keep going and you will be fine.
Good Luck on all your future builds,and if you screw up which everyone does you score two ways also,extra parts and practice material for the next one.