There's nothing wrong in blowing your own trumpet; every religion does it all the time. There's nothing wrong in WTS depicting themselves as the best there could ever be. It may repulse your taste buds and sense of modesty. If that's the case, don't watch any of the videos. I long stopped attending meetings where the videos are shown or TMS discussions when every silly detail of the video is discussed. I just don't think it's any of the WTS' fault that they want to show to the world that they have everything and the world nothing. Most self-promotionals go that way and one would be stupid to buy it all.
The comparison with Acts of the Apostles: there is a lot of self-promotion of "the Way"; you only need to read between the lines as you get along. You may say the adherents of what was yet to be defined as Christianity were promoting Jesus, and I would agree with you. But they were also promoting their conception of who they were and what they believed, and showing it up to be the best. If we go even further back in time (the Old Testament), Isreal was a "chosen nation" that stood head and shoulder above all the others (or so they proclaimed, Bible book after Bible book).
Religious fanaticism, nationalism, inordinate personal pride, all these things are driven by the same ingredients. They make the world a worse place for all of us, but that won't make religious bigots stop blowing their own little trumpet. It's more like brand trumpeting - mine's the best, yours is the least. The WTS is caught in the same process. The WTS is part of the world and cannot run its empire without borrowing that very vain and human style of chest-thumping pride.