I sympathize with everyone's problems but having had a few myself, with me its usually operator error not the program.

choose the right synth, set the drivers right and things should sort themselves out.

BIAB 2021 certainly has its share of bugs but the basic program works fine for creating songs. the bugs are mainly in the 'complicated bit' which is better done - for me anyway - in RealBand

maybe if you describe your problems in detail in simple terms we can walk you through the things to check.