ummm to be frank its sounds like "fear" is your problem, this is suppose to be fun, unless of course you front a large band and your income depends on it. An instructor told me and i believe it, If your thinking... your stinkin, the more you get frustrated with the lack of what you cant do, you fudge up what you can do. 4 hrs a day??? sheesh I'm lucky to get in a hr, you know burn out can be just as bad for you, i mean anything I am doing more than a hour is work to me and it aint fun no more. no one should be trying to be some other player, instead of being themselves. You aint going to be Slash or Page in a year, two or three, but you can develop your own style. That's the reason there are so many instructors on this site, they are all different, with different styles, if not they would only need one. Put the guitar down, go to a happy place and come back to it, you will want to come back, it works ....believe me