Ah ha, that wasn't quite what I was expecting

You spelt your own band name wrong by the way, but google helpfully corrected it for me. Not my taste in genre, but I can still try and help you improve your recordings, after all I'm also a teenager recording in my bedroom so I understand the limitations and and how make the best of a less-than-ideal recording environment.
Please don't take some of this criticism too deeply, but its best to be frank as then you can learn from where you're going wrong and build on improving...
Firstly, you
do need to go right back to basics and work on your core instrument sounds, and possibly rethink some of recording methods/techniques. There's extreme noise issues, clipping and distortion, and even basic balance issues in the mix.
Quite frankly, the guitar tone is an absolute trainwreck. How are you recording them at the moment? What guitars, amps, cabs, mics?
For a start, I can almost certainly say that you need to dial the gain right back (yes, I am telling a grindcore band to turn their amps down). Don't fall into the trap of equating more gain/distortion = chunkier. Listen to the tone of some of your favourite bands... it will be 'heavy' and thick, but still well defined... not a fizzy overdistorted mush.Try experimenting with 'layering up' tracks to build up your desired tone, trying different combinations of mics, mic positions, cabs, heads, tone settings, guitars, pickups, etc.
There are very few set rules and ways of doing things in recording, but I can say that you
will want to be hard-panning separate takes to create stereo width in some of your guitar parts. Its kind of a given for this kind of genre / guitar tone. This is where some of your 'fuller stereo sound' will come from.
Next are the drums, which are buried and muffled in all of your songs. Think dynamic; the kick and snare need to be heard and felt, and almost punch you in the face. Transients transients transients. In fact, so long as the timing is tight, a strong and punchy drum track can compensate somewhat for a lack of dynamics in the guitars (and many mixes are constructed like this). You could start by simply pulling the levels of the guitars down and making some 'space' in the mix for the drums both with improving the guitar tone on the way in, and by scooping it out with EQ.
So that raises an critical point... you need to consider how everything fits and works together in the mix, as well as the core sounds. Imagine the mix as a cube with the X-axis representing the stereo field, the Y-axis representing the frequency spectrum and the Z-axis representing 'distance' from you. Some overlapping is fine, but each instrument needs to be given its own space to sit in the mix and 'shine through'. You don't want two parts competing for the same crowded area of the frequency spectrum, e.g. two guitars both playing different parts but both with lots of low-mids.
This partly stems right back to the arrangement and how well parts fit together in a fundamental way before you even begin to record it, but its also something you have to address when you're setting up mics and adjusting tones before you hit the record button. You need to audition sounds and try to imagine how they will fit together in the mix - if you get it right on the way in then you'll have less work to do when mixing.
During mixing, think about cutting unneeded frequencies from instruments which aren't really needed, and are just cluttering up the mix and taking up 'space' needed by other instruments. A common example of this is high-passing all the guitars (anywhere between 80hz and 150hz, or even higher) to cut out some of the low-end mud that isn't needed and make room for the kick and bass.
Hmm, vocals, I dunno. I really really need to stop procrastinating and get back to chemistry revision, so I'll come back later and see if you've found any of the tips from that messy jumble of thoughts helpful
Don't be disheartened though, as you've made a good start with recordings; improvement is mainly a matter of practise. I cringe when I listen to my first recordings from a few years ago, yet at the time they took me ages to do and were made with virtually the same gear that I have now.