What you should consider in your rage against trademarks is that they protect something far weaker than copyrights and patents. Trademarks are fundamentally exchangeable identifiers. They do not hold any value beyond what they are infused with due to their attachment to some company (person/organisation/...). Unlike patents, which cordon off the part of scientific reality from most, or copyright, which fundamentally relies on deadweight losses to make its mechanism work, trademarks are almost exclusively positive: there is nothing you gain from calling your product "Mongo-X" apart from the meaning the term carries based on the company creating the product.

(This slightly glosses over some practicalities, such as some terms having meaning before being adopted as a trademark, or the possible depletion of combinations of letters that can be pronounced. But those are just superficial practicalities, and they are acknowledged in various limits to trademarks).