Boredom v. valuable, virtually platinum-plated, flight time
Can we trade jobs?

I'm sure that it's conceivable to be bored flying a Baron after only 800 hours, but, don't forget, you're on your way up. To that end, let me make one point clear:
You are building multi engine PIC time flying the Baron. That time does not grow on trees. Keep that in mind. I'd bet there are a thousand members of this board who would leap for a job such as yours. That time will mean something when times improve and you are ready to move on to bigger and better things. Times will improve. Don't know when, but they always do.
Having said that . . .
One thing that I
don't like about my job is that I'm stuck indoors all day (sometimes I get to run errands). At least when you're flying, you're
out. That one of the things that I miss about flying. If you take the ATC job, you will be stuck inside a TRACON, Center, or some other edifice. You'll find that it's quite a change from flying.
One thing that I found grossly unattractive about ATC as a career are all the shift changes. I recall that shifts rotate, e.g., you might work 7 a.m. - 3 p.m., then 3 a.m - noon, then mids. That's tough to take. It's hard on your system and makes you vulnerable to illness. Maybe that's changed and ATC now works regular hours. I realize that many regional pilots, especially the more junior ones, have to suffer stand-up overnights. But, I'm sure, they get more days off than ATC.
Of course, the plusses of ATC include the fact that it is a
government job, and all that a government job implies. You can't beat the money and benies. Also, of course, ATC carries with it fearsome responsibilities. Controllers can have "deals" and be called to task for them. I am sure controllers have periodic recurrency evals and "checkrides," just like pilots.
At 24 years old, you are still a young person. I think you should try to stick it out. Once more,
you are building multi engine PIC time. That time does not grow on trees. Keep that in mind. Of course, best of luck with your decision.