Blame the shitty tech companies, the DMA and similar attempts in the USA and many other countries stem from them stacking everything in their favour at the cost of everyone else's money, privacy, security and safety.
It's not like regulators were just bored and felt like fucking shit up, there is a nearly-global consensus these companies are exploiting consumers and markets.
Except that DMA didn't do anything for more fundamental problems like the email problem.
No, they just want to have something to brag about or think they know better (Soviet/communist style). Like, we're lazy and tired of having to carry our proprietary iPhone chargers, we know you're too, let's make USB mandatory.