Yeah, Vista wasn't so much a "terrible" OS as it was a power hungry one. It ate RAM like it was nobody's business, hardware vendors didn't bother making compatible drivers for ages, the new memory management released was pretty junk...And, as Minox mentioned, manufacturers were slapping Vista on anything and everything "because new". Part of that might have been Microsoft's fault, since they claimed any PC manufactured in 2005 could run Vista no problems which was hilariously false.
Once Microsoft threw a couple Service Packs on it and hardware vendors actually sort of gave a shit about drivers Vista ends up being quite usable if you really wanted. Unfortunately, Microsoft just decided to throw 7 out there instead which ended up being much better and Vista got abandoned pretty much.
As for on topic, +1 to TempleOS, shit is...super weird. IIRC the guy who made it was like...schizophrenic or something, had a ton of mental issues.