Mcspeed

Lime, not enough light, and root pruned(raked - see below) 2 times in one year.

Bad, bad, and terrible, sounds a bit harsh, but you need to take a bunch of steps backwards and learn about bonsai hoticulture, before you attempt it, it's really differant than typical house plant culture. I didn't see where you are from but the tree needs to get out of the house, so an effort needs to be taken to acclimate the tree to the outdoors, then start treating it hoticulturally in a better way ,and it might might make it.

Another thing I saw is fert or vitamins once a month, this is probably underdone, the bugs are more than likely a symptom of the soil being wet too much. Pruning willy nilly on a basal dominant tree can draw needed energy away from branches this can cause you problems.

Read read and read some more, in this forum and others if you are truely interested, cutting corners, or not treating bonsai correctly tends to have bad results.

azelea roots in my experiance don't tease out well( form a tangled mat of fine roots) and are done in sections of removal( the pie wedge thing), but if this has clay and or peat up under the trunk, it'll need to be cleaned out.

Sorry not tyring to beat you up, or discourage you, hopefully you can turn this one around and show it off for us later.

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