OK My computer was made in 2002 and I have been able to run really old games like arena daggerfall, gta, gta 2, The command and conquer series
my computer says it's 3d compatible. so I don't see why it's running slow.
Were you running any of those in DOSBox? Because emulation takes more resources than just running the games natively.
Also, I'm fairly sure this game is too old to make use of hardware 3D acceleration.
Having said that "my computer says it's 3d compatible. so I don't see why it's running slow." doesn't really make much sense.
3D compatible in 2002 does not mean your computer is necessarily adequate for modern requirements.