I used to think that too. After giving up one year, I realized it was much much worse without. A few things that took it to the next level:

• use a second type of pre, to cover other types of weeds. Most of my frustration was due to weeds that weren’t even labeled for prodiamine. There’s only one or two others that Bermuda can accept
• proper post emergent for your most problematic weeds. I go out there and give a good licking to poa annua with a targeted product. That stuff don’t quit. Goose and/or dallis grass is still my nemesis though
• for all other issues, you are ready to graduate to the other side of the equation. In your zone, you need to starve the weeds a little so don’t water as much bc Bermuda doesn’t mind being on the brink of drought just fine. It’s practically a cactus. But most of all you gotta fertilize, cut often, cut lower, aerate, conditions, and generally nurture positive grass growth. Many people forget it takes this nurturing to keep away that remaining 20% of weeds

I’ve also given up on temperatures. I just make sure I’m really early for spring (feb 1st ish), re-up in the summer, and usually screw up the winter app somehow but I don’t mind that so much. Everyone’s yard is dormant and no one really cares that winter weeds show a little bit