No offence intended, but you're just not coming across as reasonable -- if the product genuinely doesn't offer the capabilities it advertises then you would definitely be in the right to ask for your money back -- but that simply isn't the case.
Why don't you try getting some help to see if you can fix your problem? Other people have achieved some great results with Construct 2, so it's very obviously possible to do so, and if you're getting unacceptable performance with only 4 objects it's likely there's something amiss that could be fixed to improve your results.
Honestly, it's coming across as if you aren't interested in getting help and don't actually want to try to fix your game.
Are you using CocoonJS? Ashley asked earlier in the topic, and you haven't answered.
How are you testing your game? Are you actually running it on the device in question? Have you been doing so from the beginning of your project as advised in the "performance tips
" manual entry? Again, you were asked about this earlier in the topic but haven't responded to it.
I understand that you don't want to share what you're hoping will be your game with everyone -- you want to be able to sell it! However, if you're having the problem even with a reduced number of objects in the scene or without your events then something is obviously wrong -- how about producing a new, simple capx that's similar to your game and sharing that so that people can help you.
The simple fact is that Construct 2 is
capable of better performance than you're describing, and it wouldn't be fair to Scirra to have to give you a refund because you're doing something wrong and refusing to try to fix it.