Some people will never be great online, including me. I don't think there's anything wrong with declining a player who keeps beating you. Not everyone can be a combo master. Some of these pros are ridiculous and I know no matter how hard I try, I'll never be at that level. Once you constantly get your ass beat, it's no longer fun.
Ill be the first to tell you from my online experience in MK9, I started out losing all the time.
My record startin off in MK9 was 250+ loses ongoing and 20+ wins... I was frustrated that I was losing too, and that I couldnt get the combos like those guys u see on the YT vids and stuff with the 22+ hit combos(pre patches).
But after I retired from MK9(mid 2014), I had 5500+ wins and alittle over 1000 losses online... How?
The more I fought online, the more I began to learn and study my opponents and their weaknesses, Like a boxer studying his opponent. I then got my ass in Practice mode and learned the
BASICS of my mains inside and out. But
I did not learn how to DO the long combos strings like everyone else does when watching those YT vids...instead, I focused my energies on how to:
adapt to, avoid, counter, anticipate, Block, and break other peoples fighting methods(combo system, zoning, spammers, etc)... by studying its flaws and making sure I was well prepared(with training and strategy of MY mains) to exploit my opponent and leave him clueless of what to do after I broke their primary method of fighting.
U have to find or create another method of fighting and adapt strategies around it. Do not limit ur fighting methods.
But to learn this and more, u have to gain experience and knowledge fighting these different fighting systems...by fighting it's users online or in person.
Don't lose, LEARN!!
It also helps that EVERYONE will eventually start doing the same combo techniques... so more and more people become predictable...and thus, easier to beat... providing YOU have your own fighting methods and strategies down pack...