Using Musescore as a virtual band

I found lately that while learning theory and note writing better. That when I write a song, I can often use some or all of the play back for what I need in a song. Usually, I would either play everything myself, or get someone from Fiverr to play drums, bass, or piano that I couldn't do. But I noticed, when I wrote a song, that the instruments sounded real.
And especially after isolating the part when exporting, I could tweak it even more in the recording program to make it sound even more real.
I mainly play guitar, and funnily enough, the only thing that does not sound real in musescore, is any of the guitar sounds. The closest at all is the classical guitar.
But I play that for real anyway.
Some of the instruments, I didn't at first think I could write something that actually sounded musical or any sense, because I can't play those instruments well. Like Piano or drums. I am into fusion, so I am not trying to write simple arrangements. The first instrument I was unsure I could write for, and it would sound like someone playing the piano, in a style and ability I like, was the piano. But then I did it. And I am still not sure how I exactly did it. But when I listen to it, it sounds like a real player, playing something, I like and sounds like fusion. I would move notes around instinctively to what I wanted, without even being able to hear what I wanted in my head. That is the part, when I don't know how I did it, but I realized I could improvise in writing the same way I could when playing.
The last one I tried was drums. That really intimidated me. I thought it won't sound real, I won't be able to transcribe a real, interesting drum track in a complex fusion style. But then I did it. And I listened back, thinking how did I do that?
The last 3 songs I did, the two of them were real drummers, but the latest song was what I wrote in musescore. And I actually was compelled to do it, because I couldn't afford to pay a drummer.
And none of the drum tracks I had worked for the constant tempo changes and dynamics of the song.
I am totally against using a "drum machine" over a real drummer, if I have access to one. I still don't forgive Steve Perry of Journey for firing Steve Smith, because he wanted to use a drum machine instead.

But I know now I can write anything I want and virtually play it myself, if I can't get someone to do it.
I even tested it on other musicians. I entered a song challenge, and had Acoustic bass, Contrabass and some other things in the song, and they thought I just had a lot of instruments.

But the guitars still sound bad. The electric guitar sounds like a clavinet.