once your name, phone number, profile picture and other identifying data is stripped, they can do whatever they want with your data?
If all other identifying data has been stripped away, it is really "your" data any longer?
I'm not sure that the situation you describe here would protect the data under the existing rules either:
(a) 'personal data' shall mean any information relating to an identified or identifiable natural person ('data subject'); an identifiable person is one who can be identified, directly or indirectly, in particular by reference to an identification number or to one or more factors specific to his physical, physiological, mental, economic, cultural or social identity;
I think there is a difference between the situation which you describe (which seems to be anonymous data) and pseudonymous data, though, in that pseudonymous data does not have all identifying data stripped out, but rather replaced by a less obvious identifier.
The phone number 07700 900771 might become a2t6#g1, but, if, in a stream / sequence of data, that number always becomes that alternative descriptor, anyone in control of the algorithm / key could convert obtain the original number again with relative easy — just run all possible permutations of the phone number (which is of standard form, with specified structure) through the algorithm and pattern match.
To my mind, provided that the algorithm doing the conversion is appropriately protected, pseudonymisation may be one good method of reducing the risk associated with the processing of personal data, protecting it in the event for a data breach, and thus be a form of security measure, but is unlikely to stop the data from being capable of identifying the individual, in the hands of the party carrying out the pseudonymisation.