If you mean that there's no Linux replacement for Digital Audio Workstation, then I agree: switching is not for you. But if what worries you are the $$ you have spent, you are just another victim of the sunk cost fallacy. The earlier you realize your mistake, the earlier you are ready to evaluate the options without biases.
The thousands of $$ on audio software are spent because they actually provide the exact output needed. Think of them as a precision-tooled machine part critical to the production flow in a factory. Sure, you can replace it with a cheaper alternative but the cheaper part will likely have rough edges and the errors caused by those rough edges will cascade into your final production output...
Surge-XT, Vitalium and/or PlugData or Cardinal can get you so far on the synthesis world that maybe not even a full dedicated lifetime can explore everything you can do with it... Ardour isn't a shinning pot for MIDI editor generational features but if you actually know music-theory, it works pretty solid for writing. the in-line editor makes very much sense, just like sheet music can hold an orchestra info. on a sigle page