That depends on what state in New England you live in
California, Connecticut, the District of Columbia, Delaware, Illinois, Massachusetts, Maryland, Maine, Michigan, Montana, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, and Texas were the only deregulated states in 2017 (the most recent list I found quickly). People in the other regulated states do not understand what the fuss is about as their states set the costs and there is no consumer competition. Deregulation was a key part of the "Reagan revolution" but when California had the Enron assisted power debacle, many states pulled back from it. So someone in Vermont and a lot of other states doesnt have the option to buy from a competitive supplier. They pay more but are isolated from extreme events.
The basis for deregulation is to split the power cost from the transmission cost. That doesnt work if the utility owns the power plants so the utilities had to sell their power plants to private entities. Most if not all states required utilities to offer a "standard offer" to residential customers to keep it simple. These standard offers are usually fixed power rates for either an entire year or sometimes a winter and summer period. The utility signs a contract for guaranteed fixed price power. The firms selling the power has to supply power at this price, if they do not there are contractual penalties but the devil is in the details. That fixed cost for power is a risk on the seller so they price in that risk . The ratepayers may object to these high rates for risk free power so someone in the chain will suggest "sharing that risk" between the parties. The firms running that standard offer are regulated utilities and they are guaranteed a profit so any risk they share ultimately gets handed to the ratepayer base.
So with deregulation all sorts of competitive suppliers will pop up to sell power for what they represent is less than the standard rate. Many offer teaser rates and fine print. To an uneducated consumer that fine print can be a big problem. In the case of the lowest cost supplier in Texas their business model is act as broker between the consumer and the wholesale power market. They just charge a fee to act as broker so the consumer owns all risk with varying power prices. The prices are usually lower and the consumer forgets about the risk as 95% of the time they are saving money. In this case the risk was quite large for what was a event that was probably in the .001% range. This willing acceptance of risk is now coming back to the person who took on the risk and they do not like it. No one forced them to sign the deal. So the political approach is raise public outrage, and then demand the evil companies eat the high prices while offering the same evil companies some back room deal to get reimbursed with public funds. Lawyers will also go for class action saying that the offers did not have adequate disclosures in their publicity of the risks.
The state of Maine has been doing a study of their competitive power market versus the standard offer contracts and they keep coming to the conclusion that the private competitive rate plans cost the consumers more in the long run. Consumers sign up for teaser rates but inevitably the rates go up. The biggest supplier has been caught and fined for several consumer violations but they are glad to pay the fines as their profit exceeds the cost of the fines.