Even the European Court Of Human Rights wrote that they were involved, not that they were organizing it:

In late November 2013 a wave of mass protests began, first in Kyiv and then throughout the country, in response to the then Ukrainian government’s decision to suspend preparations for signing an Association Agreement with the European Union and instead strengthen economic ties with Russia. The protests, which became commonly referred to as “Maidan”[2], were marked by violent clashes between protesters and the police, with the involvement of hundreds of so-called “titushky” (тітушки), private individuals reported to have carried out numerous assaults, kidnappings and murders of protesters with the authorisation, support or acquiescence of State officials (see Shmorgunov and Others v. Ukraine, nos. 15367/14 and 13 others, §§ 10-11 and 14-15, 21 January 2021).

Like in Kyiv, starting from late November 2013, the Maidan protests also took place in Odesa. They were dispersed by the police, reportedly with the involvement of “titushky” (see paragraph 5 above).

https://hudoc.echr.coe.int/eng#{"itemid":["001-242505"]}