I've reloaded for 30 years. Up to about a month ago, it was all on single stage presses. A month ago I bought a Lee Pro 1000 to load 9mm, 45ACP, 38 special, 357 Mag and 44 mag plinking loads. I bought the complete carriers and case feeder needed to do so. Boy, I was going to set the world on fire. I patiently awaited the shipment to arrive.
It came and I bolted the press to the load bench and went about reading the inadequate directions on getting it dialed in for the 9 mm. 5 hours later, I'm disgusted, sweat soaked and ready to beat the thing into small pieces. I was so mad I couldn't sleep. I was determined the thing was JUNK and told myself if the next evening didn't go better, I was sending it back for the Classic turret press.
Time calmed me down and my eyes were opened. If the press doesn't work right, is finicky, or temperamental as suggested, it is the USER causing it. Nothing more. There are plenty of trouble shooting videos available to watch so my best advice is when something starts going awry, stop, figure out what you are doing and, if you can't google it. The answer will be at your finger tips. And, it will show you that it isn't the press or the primer related problems most attribute as the press. It is YOU causing it.
Be sure to keep a can of air handy, be sure to put the powder measure on properly, be sure to not over tighten the chain as it will break, be sure that your brass doesn't have crimped primer pockets, and MAKE SURE YOU GO FULL CYCLE ON THE HANDLE EVERY TIME.
Bottom line, go slow until you get it figured out. You are not going to figure it out until you screw up some. And if you can't figure it out, google it.
BTW, day two found me 45 minutes and 240 rounds later going like a machine. There wasn't one thing on the press that didn't work correctly or needed tweaking if I did my handle work correctly. I think if you are honest you'll see the same results after the initial learning pains. God Bless