Recent AMF guy here who went into jets and bored out of my mind. Might even turn around and get back into the freight dog life again to get my blood pumping finally.
Not exactly sure what airplanes you're so scared of, but the rigorous training exists to make you the kind of pilot you SHOULD be for every job you have going forward in your career. If you can't fly a light or midsized twin on your own and deal with emergencies, you shouldn't be in the left seat hauling dozens of passengers in the back. The number of inexperienced right seat pilots I've seen at regionals and jet charter companies is nuts. Sure you can check the boxes and fly well enough two crew, but damn if those guys don't **** the bed once things actually get complicated and thinking outside the box is required.
Chieftain is a blast for the new guys, but the descending + stage cooling always bites them in the ass so it "seems" scary. Beech-99 can be flown with your arms tied behind your back, especially after dealing with the fun of the chieftain, just don't over-torque it. 1900 is just a big 99. Only real difference is you can't broom the snow off the tail at the outstation. Metro requires special earplugs when you're within 100 yards of it, sucks ass in wind, and you have to pretend you're climbing a ladder every time you shut down and spin the props. Brasilia is just boring because you have to split the fun with an extra crew member.
Go fly freight because you want to know you have what it takes to be the captain and the decision maker. Have fun, and live a little, and have some real stories to tell about scary **** that happened and about the fun times with your co-workers hiding under a wing during a downpour when the big jet was late to bring you boxes. Don't end up as one of those jaded captains in 30 years who goes on APC forums and talks **** to everyone in the crew lounge because they don't have any fun stories about the time they actually had to shoot an approach that wasn't a coupled ILS or LPV. God forbid you actually touch the yoke above 400'!
After you've had your fill then you can go cry about union contracts and seniority numbers and ****ty crew meals and how much you hate commuting all the time on your days off. You're going to be doing this for 30-40 years people, have some fun with it.