At least that is the case with the Epson 3880. I had a Pixma Pro 9000II
Well, you switched from a $400 printer to a $1000+ one, I really hope you got something tangible in exchange - although it is true not always higher price means better quality.
Anyway an A2 printer may be too large and heavy unless you really need it - the Pixma Pro are already expensive, large and heavy enough for most (and maybe less demanding) "non professional" users.
The Pixma Pro reviews, including those on Northlight Images, are positive... anyway when someone asks something just telling him he bough the wrong product and switch is not that helpful, especially if what he bought is not that bad. It's like writing "got bad images with you Canon camera? Get a Nikon or a Sony! It works for me".
You can still buy the wrong product for your needs or expectations - but you really need to assess it is - and not just there's something wrong in the workflow leading to results below what could be really achieved.
I understand your suggestion here, about sticking to a brand or model when somebody asks a question about using a particular device. My answer is sincere, and I believe it contributes to the conversation. I chimed in a bit late, after many other had addressed the specific printer. In other words, the question had been answered specifically quite well, and I was joining the conversation by sharing my experience.
First, the OP has been having problems for a year with his printer. I know the frustration of spending on ink and getting no better results, and then spending more on ink. And though I switched from a "$400" printer to one that cost me $825 after rebates, still, $400 is a high price for a printer that took so much work to massage a decent print out of, and then guzzled ink at an insane rate. (But, in fact, my Pixma came as a bundle three years ago with a 60D, effectively free after the rebates. Canon made money from my ink purchases!)
I shouldn't have to point out that the OP is not the only person reading a thread. Others have the same questions, including many who are trying to decide on a printer. So, I'm being helpful to those who are searching for info on various printers.
When it comes to printers, we aren't "trapped" in a brand by a bag full of lenses and flashes. It is MUCH easier to finish up a set of inks and move on, either to another of the same brand or a different brand. Sticking with a printer that isn't performing becomes very expensive because it consumes ink.
I'm fully committed to Canon for capturing images. And I use Canon's DPP to cull my RAW's. And I have a Canon scanner. When it comes to printers, friends who contribute work to the local fine arts club and a nationally respected university museum, and who also do well in state print contests happen to prefer Epson, which is why I was willing to invest in one.
Furthermore, the Epson I use, the 3880, costs significantly less per print because of the lower per-ml priced, higher capacity ink cartridges.
I've discovered the joy of printing, thanks to this printer, the help of friends, the Schewe book I mentioned, and a lot of good websites, including Keith Cooper's.
Does this help the OP tonight? Doubtful. But he/she is not stuck with a brand, and if results don't get better, there are other options than giving up on printing altogether.