Why I'm a better jig fisherman than you.
Because most people tend to fish their jig to fast and don't put it in the areas they should to catch big bass. Skip it under that dock/overhang, pitch it into the heart of a big laydown, and crawl it through that rock point that eats lures like it's going out of style. Once you get it in a prime area let it sit and move it slow. People tend to pitch their jig in, shake it quick, and pull it right back out. You get the point, fish slower. After I bought a GoPro I realized how fast I actually fished my jigs and it was a real eye opener. I've since slowed down with my retrieve. Next time your retrieving your jig count how long it takes you from cast/pitch to getting it back to the boat. Probably much faster then you expect and much faster than you should. Another good option is to anchor up, power pole/talon down, and methodically work a high percentage area. I didn't start doing this until 3 years ago and the amount of big fish I caught after doing so went up dramatically. Most people do not work an area thoroughly enough by a long shot. Getting that proper boat position, maintaining it, and working the area slowly is key to those bigger bites.
I also make my own jigs so I have colors specific to the bodies of water I fish. If you don't think color matters that's fine (not here to argue) but I can tell you on the lakes I fish you will get out fished if you don't have specific colors at certain times of the year. I can also dial in the ROF I get with my jig based on head weight and strand count which is another important factor.
There are plenty of guys on here that would whip my arse when it comes to jig fishing but over the past 7 years of focusing on jig fishing I have made a lot of improvements that I wish someone had told me years ago.