Fat Old Tired gave you pretty good advice. I would try and listen to the people who are telling you what you do not want to hear.

After scanning the thread, it looks like you have the eye problem, the DUI, and I don't know what age you are but it sounds like 35,

This is a young man's game. Working for a regional is really going to suck. I know you think your current job sucks. Imagine being away from your family for the next 5-10 years and having a horrible schedule for less pay.

I'm not trying to sound like a jerk here, but I had a brief stint in recruiting in the oilfields. Recruiters are dicks. If the recruiters at the majors can figure out your combo of the DUI, eye disability, and age they are going to avoid hiring you. Your only quality of life is at a major or legacy. You can only do that until you are 60.

I think you need to do a better job of evaluating the opportunity cost of switching careers. Pilot jobs are incredibly susceptible to economic downturns, etc, etc. Don't think the industry wont turn on its head again in another 5 years.

Airline recruiters prefer CFIs quite a bit. Shows you will not be scared when someone else is flying and you can work well with other people.

I would keep flying fun and just do it on the side like Fat Old Tired said. You can still make scratch on the side from flying like he said.

A lot of guys would kill for an opportunity where their personal business allowed them to have their own airplane for business flying and get to do part 91 flying.