In a nutshell, Curtis, Peter Kirn, Robin Whittle, treatment of employee’s, aggressive power moves like announcing clones on x0x days, past form and lawsuits, shady tactics, undercutting in production gear, cloning undesirable limitations rather than improving because they don’t know how/why, tacky looking designs with design faux pas a plenty, rushing products to the market with dodgy sync or firmware then not fixing in a timely manner, using their financial might (earned off the back of cloning boss, mackie, electro harmonix clones a decade ago) to silence critics, the list goes on, there are probably many other reasons too.
Some people don’t have a problem with them, some do. I’m sure Behringer will carry on just fine.
Plenty of people bash Roland too, but for different reasons, I’m sure they will carry on just fine too.
Its a free market, people choose what and who they want to buy from, for a myriad of different reasons.
I don’t think anyone has a problem with cloning out of production gear, per se, it is the way in which it is done, some people don’t think Behringer’s clones are very good, personally I think some of them are ok and some miss the mark or are badly designed/implemented.
Some people would prefer that Behringer did better rather than just rushing them out, but that leaves the door open for mk2s, “good news guys, we listened and are proud to announce the RD8 emkaytwo, more pattern memories, reliable sync, full midi CC”
Some people find clones extremely boring too, look how many times have people moaned about yet another 303 clone etc.