Yes, yes, yes, and yes. In other words..I completely agree. Some people do truly seem determined to find reason to complain about every little thing and blow it out of proportion. For the most part we've never had any issues with the buses and don't find that they cost us tons of time. We also opt to even wait for the next bus to sit, which we certainly wouldn't be as inclined to do if there was a terrible wait for the next bus.
Without exception the times we find the bus lines to be worse are immediately after any evening show at any park. We've started trying to take as long as possible to leave the parks after the last show to avoid the crowds all clamoring to get out at the same time. It makes for a leisurely walk and a much less crowded park to enjoy in the last moments of each day. But getting to the parks in the morning typically goes smoothly for us.