Wow.. That list brings me back to my 1911. I bought a Auto Ord M1911-A1C several years ago. It was my first semi-auto pistol. I couldn’t hit the broad side of a barn with it. I thought it was the sights so I went to replace them. The gunsmith suggested combat sights, opening the ejection port, National Match bushing, tapered barrel, trigger, polishing the bluing off the safeties, new hammer and beaver tail and a few other things. On my first post upgrade test drive, I hit a playing card 5 out of 5 rounds at 7 yards. It was worth the high cost of the upgrades.
If I had to do it over again, I would have bought a better pistol to begin with. I guess we all learn from experience.