Single pilot landing LVK described a very confused event on the part of ATC; indicating the Controller was not aware of their location and repeatedly demonstrated continued confusion.

Narrative

Upon my initial report at Altamont Pass; LVK ATC had cleared me; 'straight in Runway 25R; report 4 miles final.' I reported 4 miles final; they acknowledged and I continued inbound. There was a great deal of radio chatter with pilots and Controller talking over each other and not waiting for aircraft to respond. Numerous pilots were issuing excessive long-winded transmissions. After my 4 mile report; Tower suddenly requested that I switch to Runway 25L. I requested 25R again; the longer runway; for which I was now 2-3 miles final. Tower repeated 25L and started asking questions of me while also issuing commands to other aircraft. Rather than launching into explanations and entering a negotiation with the Tower on a congested radio frequency I simply requested 25R again. Tower refused; and I side stepped to the left runway reading back 'Runway 25L.' Just then; a Cirrus rounded base to final 25R less than a half mile ahead of me. As I was landing 25L; Tower seemed to have no idea where I actually was because as I was flaring on 25L. They were reporting me to other traffic as short final 25L and Tower continued to report me as short final as I rolled down the runway. As I turned off on Taxiway G to the north; Tower never acknowledged my turn off; nor did they tell me to hold short 25R. In the meantime; a landing aircraft had to make a missed approach because Tower had positioned another aircraft in front of them for landing; cutting them off; similar to what Tower had done to me with the Cirrus; except this incident was evidently closer to the ground. I reported to the Tower that I was holding short 25R at G. I had to wait an inordinate time as Tower; obviously confused; started issuing frequency changes to second Tower frequency; amending instructions; asking aircraft where they are; and telling at least one to remain outside Class D. After prompting them during a moment of radio silence; Tower finally cleared me to cross 25R. After crossing; I had to repeat my taxi request to Ground three times before Ground understood. Ground should have comprehended where I wanted to go when I said 'clear 25R at G; taxi to fuel.' This type of radio confusion is pretty typical for Livermore Tower. Over the years; I've experienced and witnessed numerous incidents. Tower has forgotten which runway they had cleared me to land; later playing the tape and admitted fault. They've requested I turn head-on into oncoming traffic and I have often heard them getting mouthy and congesting the frequency while chastising pilots and making snide remarks.