I have a fair bit of personal experience with them and I've read as much of the Middle Eastern Catholic literature available in languages I read as I can. In the Melkite Greek Catholic Church, recognition of the harm done by their very existence is a basic part of much of their literature over the past century and a quarter. In other communities,there's a range of views, some of which amount to quite noxious lust-for-power. But the basic historical fact, which I've seen on the ground and is obvious from history, is that the Eastern Catholics have fragmented local Christian communities and caused many of what would've been their most capable elements live in a fantasy-land of thinking they're Westerners, either totally disengaged from or hostile to their surroundings (there's a political element to this) and disengaged from their own heritage in a way somewhat more insidious than the category of lituregical 'latinizations-- for example, I've had UGCC and Melkite Catholic clergy separately complain to me that their mostly Jesuit-run education for priests deliberately avoids teaching any sort of liturgical theology.
There are exceptions and bright spots of course, such as the Maronite priest Yuwakim Moubarac or the Melkite Catholic bishop Gregoire Haddad, but the former wanted to separate from Rome to pursue local, Antiochian unity and the latter was forcibly retired by Rome against the wishes of his synod on account of his social activism and the generation of members of these churches sticking up for these kinds of things is long passed-- the Zoghby affair (largely precipitated by Haddad's retirement) in particular led to Rome making sure that bishops in the region not be the sort of people to get big ideas.
I don't doubt your experience, whatever that might consist of (you didn't really specify), but what you say above doesn't really constitute evidence. And you only mention the Middle East not India which you mentioned earlier, let alone anywhere else EC's might be.
Just what does the harm or damage consist of? How widespread is it? Is it solely the result of the presence of EC's, or are other factors involved? Is the fragmentation of Christian communities you refer to directly and unquestionably attributable to the presence of EC's? If so, how has that been determined? Is any of this documented in sources publicly available to readers of English? Is it common (and documented) that UGCC and Melkite clergy complain about the Jesuits (Hah! I'd complain about them, too, if they were teaching me!!

)? (Why don't the UGCC and Melkites grab the bull by the horns and educate their priests themselves? I know...Rome. Yeah, Rome has MUCH to answer for regarding EC's.)
Please don't get me wrong....I'm not being argumentative (okay, maybe a little

), but I'm genuinely interested. However, meaning no disrespect, you can't really expect me to take just your word for this, hence my asking for other sources and documentation.