It is very possible that the doses you're on are too high. I have definitely experienced that and dropping the doses can make a huge difference.

A successful medication regime shouldn't make you feel like a lifeless zombie - at least, not past the time of the initial 'getting used to the med' phase (about 3 weeks). A good med regime will make you feel more energetic (but not manic), inspired instead of depressed and anxious, emotionally pretty stable, and generally feel good about yourself and your life - also, the right meds will help your sleep normalize. Yes, many meds do tend to cause weight gain and (I find) they tend to cause me to be sleepy earlier than I might otherwise.

I'll be frank. For me, if it weren't for psychiatric medication I would have suicided many years ago.

If I were you I'd give dropping your doses a try before going off entirely.