There was no spite in it - or at least if there were any spite in it, the UK was party to it when the legislation was originally written back in 2002 - when the UK was a member state, and Brexit was not even a whisper.
The UK helped to implement the following regulations on who can register for a .eu TLD at that time:
(i) undertaking having its registered office, central administration or principal place of business within the Community, or
(ii) organisation established within the Community without prejudice to the application of national law, or
(iii) natural person resident within the Community;
(Regulation (EC) No 733/2002 of the European Parliament and of the Council, Article 4 (2) (b))
There were some amendments in 2019, but the meaning is broadly the same as the original draft (at least in this context). The key relevant change is the addition an entitlement for EU citizens who are not resident in the EU (e.g.: those who live in the UK).
The UK helped to implement the following regulations on who can register for a .eu TLD at that time:
(i) undertaking having its registered office, central administration or principal place of business within the Community, or
(ii) organisation established within the Community without prejudice to the application of national law, or
(iii) natural person resident within the Community;
(Regulation (EC) No 733/2002 of the European Parliament and of the Council, Article 4 (2) (b))
There were some amendments in 2019, but the meaning is broadly the same as the original draft (at least in this context). The key relevant change is the addition an entitlement for EU citizens who are not resident in the EU (e.g.: those who live in the UK).