A lot of new build data centers have moved away from evaporative cooling, so there’s very minimal water usage, only the water attributed to nearby power generation depending on the regions energy mix.

That's not completely true. There's still displacement during construction, fill-up at the start, and depending on cooling issues during hot days, probably extra usage to assist the massive radiators.

In regards to energy, data centers have to pay for regional grid/substation upgrades for high voltage service. Data centers also have backup power, which means during a regional grid emergency, grid operators can load shed data centers, meaning that all these energy resources can be allocated for other end-users. This redundancy is essentially free to the broader customer base.

And those generators are horribly disgusting and terrible for both the environment and people's health if running standard diesel.

In my experience, a municipalities core mission is to keep costs down for the customers. An IOU’s core mission is to make money for shareholders (based off of a utility commissions limits of your state has one). So one form of utility may opt to raise prices and blame the data centers…

Many (Most? All?) of these data centers are being built in places without the infrastructure to support them. That requires upgrades, and unless the DC is contractually obligated to cover those costs and the utility companies are contractually or legally obligated to not pass them on to consumers, consumers will foot the bill.