I've been cooking from scratch for years & I think that helps as a lot of it is almost automatic for me now. The more you do the quicker & easier you will find it.
If you are doing a big batch cook stop before you start & think about what you are going to do.
So if you are making soup & a cottage pie, for example, start by washing all the veg you will be using, then peeling all the veg & then chopping them all & putting them on to fry in the two pans you will be using.
Then fill up your sink with hot soapy water so you can chuck any utensils you use straight in so they will have a chance to soak & won't be so manky to wash up.
Good knives & enough chopping boards are essential for me.
I have an old ice cream tub that I use as a kitchen top bin so I can chuck waste in it as I go.
Kitchen paper is wonderful for covering things & mopping up spills.
I have a hand held stick blender for soup so I can just blend the soup in the pan & not have a whole food processor/liquidiser to wash up.
I really do try to apply time & motion efficiency when I cook - so if I have to go to the garage to get an onion (it's where I keep my veg) I will try to think what else I might need whilst there.
I hope none of the above sounds too simple & good on you for cooking like that - it certainly tastes better.
PS Am not a fan of butternut squash for all the reasons you gave and I do think it's quite bland & you need lots of herbs/spices to boost it.