Do I deserve to buy this phone?

Edit: thank you all for the valuable financial suggestions and advice

Note: the second part is a rant and actual question is in the first part.

I'm 21f. Recently graduated, recently started earning. My current phone is an mi brand one (poco m2 pro) which costed a bit less than 12k when my dad bought it 4 years ago in my 1st year of college. Now that my phone has gotten pretty much old and started to lose its capabilities and I have my own money, I am planning to buy a new phone.

At first I thought maybe a 15k phone is enough. But I was looking into the features I wanted and ended up looking at galaxy s series which is coming for 30k(sale) minimum price which I can afford all with my own money.

My question is do I deserve it? Is it a wise decision to buy a high end phone in an early stage? (At the end of the post I said I want to buy it for petty reason but seriously I'm thinking if it's a good thing to spend so much money in this stage. I have only been earning for a month. But I don't really have any other responsibilities as of now and I live with my parents)

Now comes the rant. So my brother had a better phone(15k) back then when I got the phone 4 years ago. That time when we chose my phone (my brother chose it), my dad was like "does she need that costly of a phone". And mind you we both achieved the same heights (we both are iitians) so it's not like I'm some dumbo. My brother's explanation was that I can use the phone for full 4 years of college then I can buy..

Then shit happened and my brother ended up having an academic gap of 3.5 to 4 years (basically the whole time I was in college) all because of his own stuff. I thought it was mental health problems and tried to help him. But he always treated me as if I'm mental everytime I brought it up. So now I got hurt too many times to try to be empathetic with him.

Anyway this is about phones. When I was in my 3rd year, my brother and dad got into a fight(my dad brought up college) and my brother smashed his phone in anger. After few weeks, my dad bought him a new phone which costed around 18k. My dad also bought himself a phone which costed around 16k.

Summary is they both changed their phones throughout the period I had my phone. And all theirs were more costly and somehow I got asked why I needed a costly phone. All this considering I was in college in a different state and they both were sitting at home both scrolling on phone mindlessly

I asked my dad if I can buy the Samsung phone.. with my own fricking money.. he again said why do you need it. My brother asked if my current phone can't be repaired. (Volume button sunk into phone body and battery has become bad and camera lens is broken)

Not that it matters but all my friends had way better phones in college and I never asked for new phone throughout. Now they have iphones and I'm still thinking whether or not to buy samsung even though I can afford an iphone

I kinda want to buy a costly ass phone just to rub it in my dad's and brother's faces.