In many of those cases, including me, It's not that they don't like them. It's just that the value really isn't there in them. Even your own engine spent a lot of time getting sorted out according to your own posts on the other thread. That is time spent not flying. RCVFR post shows a typical example of this also.

Cheap isn't always economic if you actually want to fly (don't a lot of others preach this a fair bit?).

This doesn't only apply to RCGF, There are many other brand threads on the various forums full of questions about how to modify (or replace) carbs or ignitions, how to find crankcase leaks, how to fix faulty reeds, how to overcome early bearing failures etc to make an engine reliable. Those threads often start with the person asking why their engine won't start or run right. Occassionally it has already cost them a plane or two.

Then there are also a lot of threads about "how great XXX seller is for their backup service" when the requirement to have sent the product back should not have been there in the first place. How is your shaft now that it has been taken care of? - why did it ned replacement to begin with and why do the engines need Nylock nuts? It cost someone somewhere along the chain for the new parts and the postage etc. Chances are that was a loss to the seller.

Even the worst manufacturers sometimes let an occassional good item slip through their "QB" process (that is not a typo, it stands for Quality Breakage but it is gracefully adopted because a "B" must be better than a "C"). I even heard a guy mention how he had a good run out of a Venom Engine once as it had lasted for a few years without a fault. I have seen some that are happy with their GRPro's also. Even those "great companies" occassionally made one acceptable item out of the many poorer ones.

My preference is to buy a product that will fly and last. Others prefer to have great service while others prefer to spend time on the tools. Take your pick really, it's a free world (a concept the Chinese take a lot of pleasure in taking advantage of).

Once you have experienced a better class of product, you tend to notice the vagaries of the lower class product but until such time, they are all the same to the uninitiated. Nowadays, I find it a pleasure to take a brand new engine out of the box, install it, have it runing on within the first few flips of the prop, have it tuned a few minutes later and know it wil last me and has got a very good actual throttle response right through the whole throttle movement and not just the first half of it.

Remember your first car (no matter what the brand). Back then it was probably "the bees knees". More than likley now later in life you have experienced better vehicles. Would you like to go back to that first one? (other than perhaps experiencing the "other first" on the back seat of it).