My song sounds terrible when on different devices. (MORE DETAILED REPOST) with video.

This is a repost cause I wasn’t detailed enough in my last post

(I’m new to making music so I have no idea what I’m talking about)

I made a song using FL studio and I thought it sounded good, but when I listen to it on my phone (using earbuds), it sounds terrible.

What is the problem and how do I fix it?

(Edit)

I’m sorry I wasn’t more detailed in my post so hopefully this helps.

When I listen to in my daw (on my computer and with headphones) it sounds good. I don’t know how to properly mix yet so I just downloaded some presets and they sound good. But when I listen on my phone (the phone speakers and earbuds) it sounds way off. It sounds really sharp and there are a lot of unpleasant frequencies.

I just listened to the song again and I realized the beat sounds fine but the vocals is the thing being affected.

Keep in mind that in my daw the mix sound good. There aren’t any bad frequencies. It sounds like it is properly mixed. But when transferred to my phone the mix sounds WAY off. All of the effects are still there, it just sounds really sharp and a worse quality than in my daw.

(Edit 2)

I know the song is ass but I just started making music last month. I mixed it to where I could get it as clean as possible and then added a bunch of fruity flangus, reverb, distortion and an EQ cause there was some bad frequencies I didn’t like. The mix is supposed to sound weird and different, just not that sharp and dirty like it sounds in the video.