TLDR; you're definitely not alone.
I'm absolutely failing with my 40B lately. I fought back a GHA infestation with some flucon, but my aiptasia reached plague levels after losing my peppermints and the local shops not being to get any for some reason. That and some alk issues have killed just about all of my SPS now, one of my LPS, and is threatening zoas. Added some berghia about a week ago, but there's no discernible difference yet. I'm trying to get my water quality back on track with water changes and re-starting kalk water, but it's a battle every day not to shut it down. The tank looks awful, full of dead corals, aiptasia, and some cyano, also I'm trying to sell my place and buy a new one. In combination with having to possibly move my tank multiple times this year, to be able to close a home sale and purchase, it's tough to keep up the motivation. Not to mention I'll also need to patch/paint the ceiling before a closing, because ATI can't be bothered to make a tank mount for their lights, so the sooner I get on that the better.
I've been in the hobby for 8-9 years, and I've had some nice and successful tanks. This one I've had for a couple of years, and has just been one problem after the next; ich, flat worms, bryopsis, GHA, bad salt, aiptasia. All I seem to do is move from one problem to the next, and never really hit a point of regular maintenance and enjoyment, just constant frustration. The hobby stops being fun for me at that point. The only corals that seem to thrive are my duncan and my dragon's breath favia, and the duncan has not been happy the past couple of weeks. It may be time to pack it all in until after I settle my housing, and then consider a restart, maybe even going back to FW where I started. ;Dead