the fact that you posted with thoughts of quitting means you dont wanna quit,ask me how i know. I also know the feeling of having everyone around you act like you dont exist as a bowler ,and thus feeling out of place and having the thoughts of quitting. A week is a long way from a slump ,and recovery if you work at it is right around the corner. I slumped for 2 years, I wanted to quit ,or at least i said i did, but i didnt . I just happened to run into 2 people in the bowling alley who didnt mind watching and helping me with a couple of things, I even shot my first 300 this year. So believe me when i say ,if you love it work at it . Every good bowler in the alley isnt a snob and most coaches are patient or they couldnt coach. A good coach, I believe, will take the time watch you and either break you down to scratch or find areas in your game to improve on. I think one important key is attitude. You have to believe you can be better. You have to believe you are better than you let yourself think you are,and you have to believe that with work ,practice and possibly coaching you will be even better yet. Positive attitude breeds positive results.
If you are rolling over the thumb hole regularly maybe take one of your less used balls and have it drilled full roller. I know one guy who bowls full roller and he never hits the thumb ,also has great reaction almost makes me want to try it. But whatevr you do dont keep beating yourself up about it ,do something productive ,or... quit. But dont quit you will miss it .
--------------------
my style, the art of bowling without bowling