These EU laws start with the current circumstances and motivation why the law exists. An objection to why DMA is bad can be found in the first two recitals:
> (1) Digital services in general and online platforms in particular play an increasingly important role in the economy, in particular in the internal market, by enabling businesses to reach users throughout the Union, by facilitating cross-border trade and by opening entirely new business opportunities to a large number of companies in the Union to the benefit of consumers in the Union.
> (2) At the same time, among those digital services, core platform services feature a number of characteristics that can be exploited by the undertakings providing them. An example of such characteristics of core platform services is extreme scale economies, which often result from nearly zero marginal costs to add business users or end users. Other such characteristics of core platform services are very strong network effects, an ability to connect many business users with many end users through the multisidedness of these services, a significant degree of dependence of both business users and end users, lock-in effects, a lack of multi-homing for the same purpose by end users, vertical integration, and data driven-advantages. All these characteristics, combined with unfair practices by undertakings providing the core platform services, can have the effect of substantially undermining the contestability of the core platform services, as well as impacting the fairness of the commercial relationship between undertakings providing such services and their business users and end users. In practice, this leads to rapid and potentially far-reaching decreases in business users’ and end users’ choice, and therefore can confer on the provider of those services the position of a so-called gatekeeper.
It's a bit long for HN comments (although 257 words is about a minute of reading) but I didn't really know what could be fairly cut out
> (1) Digital services in general and online platforms in particular play an increasingly important role in the economy, in particular in the internal market, by enabling businesses to reach users throughout the Union, by facilitating cross-border trade and by opening entirely new business opportunities to a large number of companies in the Union to the benefit of consumers in the Union.
> (2) At the same time, among those digital services, core platform services feature a number of characteristics that can be exploited by the undertakings providing them. An example of such characteristics of core platform services is extreme scale economies, which often result from nearly zero marginal costs to add business users or end users. Other such characteristics of core platform services are very strong network effects, an ability to connect many business users with many end users through the multisidedness of these services, a significant degree of dependence of both business users and end users, lock-in effects, a lack of multi-homing for the same purpose by end users, vertical integration, and data driven-advantages. All these characteristics, combined with unfair practices by undertakings providing the core platform services, can have the effect of substantially undermining the contestability of the core platform services, as well as impacting the fairness of the commercial relationship between undertakings providing such services and their business users and end users. In practice, this leads to rapid and potentially far-reaching decreases in business users’ and end users’ choice, and therefore can confer on the provider of those services the position of a so-called gatekeeper.
It's a bit long for HN comments (although 257 words is about a minute of reading) but I didn't really know what could be fairly cut out
Full text: https://eur-lex.europa.eu/eli/reg/2022/1925/oj