Deity doing the same moves over and over again can make anyone frustrated, but your Mitsu isn't bad at all. If I was close enough to a major I'd go in a heartbeat, even if I got bodied.
Well I mean if it'll cost you that much then it's probably not worth it, but still, I'd want to go to a major for the experience if anything. How would it cost you that much? Do you have to travel far?
As someone who has gone to many tournaments as well as ran a few. I suggest you go if you were even slightly interested. Train up before the tourney, play your best and go in there with the will to win. Get whatever place you earn, chill and meet new people. Then play people after the tourney and just enjoy the experience.
Also if you play the same people all the time, try playing new people online. It should make the game a little more fun and help you improve. The same training partner can have negative effects sometimes.
^This, 100% Especially Deity lol. Once he knows how to fuck with you, he will inevitably continue to fuck with you. That's why whenever he or I make a lobby and run long sets he ends up running train even though I might take the first few games. That's just the kind of player he is though, he's good at long sets and frustrating his opponent.
And if it's been going on for a while, you might want to take some time off from it and just study frame data. If you have an android, I highly recommend downloading the SCVHandbook app from the google play store. Full frame data for all characters in a convenient app.