The combat system is pretty piss-poor, too - to the point where many people have released their own, better, rulesets for combat to address these problems.
Over all yes the whole thing came across as very weak and half hearted but of course it's freaking Spelljamming so it still sold very well despite being a weak product.
(It's pay what you want, so you can pay zero if you want to try it out.)
This was written by a DM friend of mine who also runs an excellent podcast, if y'all are into that :)