My evening flight from Gatwick to Milan was delayed, resulting with my arrival at 2:45am when there was no public transportation available (apart from taxis).

According to EU rules any delayed flights over 3 hours can be reimbursed (partially) as can any inconveniences.
This is the email I received from Wizzair's claims Dept:

Thank you for contacting Wizz Air Customer Service Department.

We would like to extend our sincerest apologies regarding the inconvenience caused by the delay of your flight. After thoroughly investigating your case we can confirm that the delay of flight W4 5786 MXP-LGW on the 3d of July 2023 was 02:57 h, based on the arrival at your destination airport.

Please be kindly informed that passengers are entitled to the compensation specified in Regulation (EC) No 261/2004 of the European Parliament and of the Council when there is an arrival delay of minimum 3 hours.

Therefore, unfortunately we regret to inform you that no compensation is due in this specific situation.

Should you have any questions or concerns, please do not hesitate to contact us by replying to this email.

Have a pleasant day!

Kind regards,

I am at a loss for words (and taxi fare!)