You don’t deserve more than you have because if you did, you’d have it already.
Recognise that you can think and feel you deserve something right now, but not actually have it. It’s quite normal.
You don’t have it because it is not deserved (which is tough to confront) and you feel you deserve it as you are naturally biased.
You can absolutely go on to deserve more, but if you don’t have something now, then you don’t deserve it now (however you feel about it).
Accept this is the case and establish what you need to do to deserve what you want.
To deserve more, you have to serve more, take appropriate action and add more value.
It’s all on you.