Upvote:6
Seems aggressive to me. That's about 4000 km and 45-50 hours of raw driving depending on whether you go for "scenic" or "fast". Distances are much larger than most Europeans are used to. Traffics is also a bit slower (lots of traffic jams, low speed limits) and the roads through the Mountains or along the Pacific coast are beautiful but slow.
The national parks are also fairly big and so trying to "do" them in half a day isn't really not doing them justice other than getting the "check mark". Consider a sequence of maybe alternating "one day drive" with "two days exploring". You won't get as many locations covered, but you may have a much better experience over all.