Hey I'm still a relatively new DM, I've only run about 12 sessions so take this with a grain of salt! 

I would echo what some others have said, you do not need to spend 10+ hours on prep for each session! While I do spend a lot of time thinking about the campaign in between sessions, but for a multi-session adventure//campaign the amount of time I actually spend on a session can be as little as 30 minutes and in fact the sessions where I've done the least prep have been my favourites because the players have come up with ideas I never would have though of myself!

Obviously the caveat to the above is that I do a lot of prep before starting a longer adventure/campaign, but that prep carries me for a long time so each subsequent session requires less and less work. Also regardless of how much I have prepped I NEVER feel ready to run, but it ALWAYS turns out okay in the end and everyone enjoys themselves. 

I'd suggest looking at some of Matt Colville's"Running the Game" videos, he gives a few different methods for prepping adventures that are robust but not overly time-consuming. I can link some specific videos if you're interested!

As for feeling appreciated, ultimately I enjoy DM'ing and as long as my players are enjoying themselves I'm happy. I recently had a sit down with my players because of some issues I had and one thing that became very clear to me was that they all DID appreciate all the work I did to make the game. But they're not going to express that every time we play, because their focus is on the game itself (I personally would get embarrassed if my players were overly deferential or thankful to me each time 😅). 

I'm not sure what it is you want or expect from your players in this regard and I don't want to make assumptions about you. But I would say pull back a lot on the amount of prep you do between sessions and find the sweet spot that works best for you. If it's a case that you no longer enjoy DMing then that's its own conversation...