Back in 97 i dropped out of 121 training after passing my sim checkride and oral but prior to an actual aircraft checkride. I had about 1200 total 250 multi. The reason I left is because I would have been making 13K and having to move/commute when I was offered a 135/91 turbine job where I lived making 2 1/2 times a much. I was never asked by an interviewer about that first 121 job nor why I left it.
just be honest why you left if they ask, they can sense BS. Personally I think you showed good judgement by realizing you were in over your head with low time, especially since you were able to complete your next 121 and 135 training when you gained that extra experience. If you had failed your next 121 attempt that might have set off some red flags though.