My biggest challenge was trying to convince my old boss why things need to be done the way I'm saying and not the way he wants (of course, arch wise and not business wise)

After giving up, I ended up going back to collage, studying Masters in Business Administration just to know how managers think, took me two years, and now I'm in my final semester, even though I left my old job, I am now able to handle things in a better way in my current one regardless if I was arguing with general manager, or project manager, luckily clients are not allowed anywhere near me ...