There are plenty of cheaper EVs than Tesla e.g. Leaf, Zoe, Ioniq, Kona.
And there are technically better EVs than Tesla e.g. Porsche Taycan.
And you can argue there are EVs that are as good value e.g. VW ID.3/4.
The drivetrain in the Model 3 is vastly more efficient and elegant in design. The overall systems design is more of the same, more efficient and elegant with simplified wiring harness, less onboard computers and more sophisticated infotainment and drive computers at that.
What the Taycan does do better is feel more like a sports car, has better finishing and likely much better quality control.
But "technically" Tesla is 5-10 years ahead of everyone except maybe Lucid which have been building advanced batteries and drivetrains for Model-E for the last decade.
It's objectively better than anything in a Tesla.
It's worth mentioning I consider the Taycan to be a better and more fun car. I just don't agree it's technically superior to the Tesla Model 3 on drivetrain/battery/onboard computer aspects.