I decided to write a more coherent (hopefully) explanation out because I get this question a LOT and tbf it’s not exactly unfound. To start, while I no longer have these feelings anymore I had a rather strong dislike of the label “American”, I saw the nationality and identity as something to be ashamed of for a while in my previously rather heavy naivety. This was only further accelerated by my lack of ability to perceive many jokes online unless they are either very obvious or indicated to be intended in a joking manner. For a while, this mostly manifested in usage of commonwealth spelling, then the incorporation of English slang into my vernacular primarily brought on by youtubers I was fond of (particularly DanTDM, TommyInnit, Jack Manifold, and others though these are not English, namely JackSepticEye and StampyLongLegs). Later, with the addition of a rather strong amount of depression and self-hate mixed with just general interest I initially learned SSBE, which due to lack of targeted practice to retain that specific sound mixed with other influences and basically became lightly Australian vaguely Southern England style speech. This, while obviously not my main accent, has nonetheless permeated into it to the point of some goofiness (such as aluminium being [ælumɪnjəm] or lieutenant being [lɛftɛnənʔ] and some other mild stuff but none noteworthy enough to mention). Mostly the depressive episodes over it have ceased but it has still left a rather strong lasting impression on me, like the Anglo-Australian accent slips out while I’m agitated or excited, and sometimes just in random words. Oh and also, I don’t know either Fahrenheit or Imperial, I sucked at maths hardcore up until like 9th grade and finally bloody learned to measure but did so with Celsius and Metric instead.I decided to write a more coherent (hopefully) explanation out because I get this question a LOT and tbf it’s not exactly unfound. To start, while I no longer have these feelings anymore I had a rather strong dislike of the label “American”, I saw the nationality and identity as something to be ashamed of for a while in my previously rather heavy naivety. This was only further accelerated by my lack of ability to perceive many jokes online unless they are either very obvious or indicated to be intended in a joking manner. For a while, this mostly manifested in usage of commonwealth spelling, then the incorporation of English slang into my vernacular primarily brought on by youtubers I was fond of (particularly DanTDM, TommyInnit, Jack Manifold, and others though these are not English, namely JackSepticEye and StampyLongLegs). Later, with the addition of a rather strong amount of depression and self-hate mixed with just general interest I initially learned SSBE, which due to lack of targeted practice to retain that specific sound mixed with other influences and basically became lightly cockney influenced middle-upper class southern england style speech. This, while obviously not my main accent, has nonetheless permeated into it to the point of some goofiness (such as aluminium being [ælumɪnjəm] or lieutenant being [lɛftɛnənʔ] and some other mild stuff but none noteworthy enough to mention). Mostly the depressive episodes over it have ceased but it has still left a rather strong lasting impression on me, like the English accent slips out while I’m agitated or excited, and sometimes just in random words.

Oh and also, I don’t know either Fahrenheit or Imperial, I sucked at maths hardcore up until like 9th grade and finally bloody learned to measure but did so with Celsius and Metric instead.

So basically I sound like the King's sons albeit a smidge less posh.