In California, a U turn is considered a left turn that keeps going. As a result, a U turn is legal anywhere that a left turn is legal, except when signs are posted otherwise. So in a left-turn pocket/lane, it is both reasonable and expected that people will make left turns, some of which will continue into a full 180 degree turn. People who do U turns are doing what is allowed, and they have every right to do so. If this seems like a problem, then talk to your transportation department to restrict U turns.
I'm not aware of any aspect of a U turn procedure that would be any different than than a standard 90 degree turn: use turn signals, look for oncoming traffic, look for pedestrians, turn slowly as required by the radius, roll out of the turn with careful acceleration.
I've not used it, but have heard decent things about Kagi, a paid search engine. Supposedly, it finds things like how old Yahoo or old Google worked, without AI (but is optionally available?), and no ads.
I would think the major barrier to entry is the business model: ad revenue goes to those that can deliver results. Google AdSense has dominated that realm for years, so it would take a major upfront investment to challenge them on that. Not much different than how it's hard to compete with established airlines to a particular airport that they already serve. Economies of scale tend towards consolidation.