I know I'm late into this and I know how you feel about the sub thing; I've had it happen to me more than enough times in the past. Regardless of the quality of the subs work, above or below your own standards, it's usually a cost related issue.
I had a bid to reroof sidewall and replace all the trim on a house with Azek, (don't like the stuff AT ALL). I then got a call from the Mrs., a week or 2 later saying they were going to use a diff cont. for the roof and sidewall, could I give them a separate price to do the trim. This was the same woman who set her hair on fire while burning brush in the back yd the day we measured the house. Ben tackled her to the ground and I wrapped my jacket around her head while she was screaming and fighting back because she didn't believe us that she and her hajib were on fire.
Anyway, I told her, her cont. of choice should and should want to do the roof trim to ensure his roofing aligned properly. Well, he didn't do the trim, had already roofed and wanted to get onto the sidewall pronto. I went back a couple days later, climbed up to the roof and after maybe 30 secs came back down. Not only was the field work sloppy but the overhang was a trapezoid instead of square. I turned her down, saying the trim should have been done prior to anything else and because of the horror show on the roof; I would not take the responsibility of attempting to match the roof trim to the overhang and still maintain proper wall contact and orientation for C boards and eave trim.
The cont could have kept his mouth shut, put the gable trim on correctly then recut the roofing overhang to match it, the roof was 2 to 3 stories high from eave to ridge no one would ever know how bad it looked up there. But I figured if he wasn't smart enough to do the job right the 1st time why save his or their asses.
So to make a long story longer, I was introduced to them via my belurved and late dentist, I later got an earful from my dentist and wife who were upset because of my refusal to do the work; the lost cust were clients and social friends. I informed the Dr. and Mrs. as to the details which their friends neglected in their commiserations.
I'd say bow out, not because you're upset but because you don't want to get mixed up in another's work, especially if you end up having to alter existing work to satisfy your own standards to make it right. Add that to the 1 hr drive to the job it ain't worth it.
Work smart not hard!
Never bite the hand that looks dirty