Jacko, calling Swansea a bottom half team is harsh. Calling them mid table is reasonable, but they're certainly a team that can cause problems to anyone. I understand your frustration but you shouldn't underestimate them.
That said, the focus of your criticism, as with most Chelsea fans, is Rafa. I'll be honest here, I don't like Rafa, neither as a person nor as a manager. I don't like his style, I think his squad selection has been poor and his subs are questionable. But you can't deny his achievements, both at Valencia and during most of his time at Liverpool (he was ***** at Inter, though), which in short means that whether I like it or not, his style works. The problem here lies in the fact that his style require certain types of players which you don't currently have, and his squad selection and subs are affected by this as well.
I don't think you can defend his squad selection against QPR or his decision to start Torres regardless of his shitness, but you can't put all of the blame on Rafa. The problem is simple - di Matteo "built" -for lack of a better word- a squad he liked, but when he got the boot, he was replaced by the only half decent manager around that was willing to take a big fat pay cheque and the chance to win some silverware in 6 months - and you can thank Tim Roth's russian evil twin for that. If you consistently sack a manager or two every season, being honest, who'd want to take the job? And don't get me wrong, my previous statement wasn't meant to make Rafa sound like a moneygrabber. He took the only available job around to try and get his career back on track - and as previously stated he was the only good manager around willing to take such a job. Neither club nor manager had much of a choice here.
And while I think we can all agree that he may be trying to fit square pegs into round holes -having to play a Lampard-Ramires double pivot, for instance- it's not his fault that he's only got square pegs. He inherited this squad and he's trying to make do with what he has at his disposal, which will obviously not yield ideal results, but that's what Rafa is stuck with, just like Chelsea are stuck with him. You may not like Rafa, I certainly don't, but if you think sacking him would change anything, you're right, it would, but for the worse. Who on earth would take the Chelsea job then? All I can say is be patient, get behind him and hope for the best. Me, on the other hand... well, I'll still enjoy watching you guys get done by QPR and Southampton and Torres' lousy attempts at being a forward.