I know every vehicle driver obeys every law on the books, and would never dream to disregard any sign directing them to drive in a specific way. So let me be the first of hopefully many to deeply apologize to you for the way that you were triggered by seeing a cyclist driving on a road. Can you please show us on the doll where the cyclist touched you?
Seriously though. When I am on a bike, I do my best to follow all of the rules of the road. I ride as far to the right as I safely can (which is what the law requires), which is also not the same as riding as far to the right as possible. The Memorial area has put themselves in an interesting twist. The pedestrians who live there have persuaded the parks to in effect ban bikes from riding on the "bike path" in Terry Hershey Park by enacting a blanket 10 mph speed limit, and writing tickets for violations that are more expensive than driving 55 through a school zone, and can't be eliminated via taking defensive driving. On the other hand, their "no bikes allowed on the road" signs are most likely to be illegal under Texas law if they were ever challenged. And violating them is a moving violation that is significantly cheaper than the Terry Hershey Park speeding ticket, and can be eliminated via defensive driving.
The reality is that with the Pandemic, more people than ever are wanting to use bikes for recreation and in many cases for commuting. By shoving them off of the "bike path" in the park that was designed to be used as a route for commuting and recreation in favor of pedestrians, the county has forced a confrontation between cyclists and motorists on roads that were deliberately not designed to have room for bikes to safely ride there. Your questions may be honestly intended, but cyclists are just tired of being told over and over "you can't ride on the road, go ride in the park", and "you ride too fast in the park, if you want to go that fast, go ride on the streets", and "why would you want to ride a bike on the streets? It isn't safe!", and "Why can't you ride over to the side of the road so that motorists can pas you easier" (where it isn't safe at all to ride because of debris and crappy road conditions), etc.
Yes, we would love to ride somewhere other than the streets. Or we would love to ride in a designated shoulder/lane that was safe for our use and out of the way of motorists. When we do ride in the streets, most of us try to follow the laws, and we do get angry at other riders who don't, because we know that we will all get blamed for their bad behavior. But at the same time, I am not responsible for their bad riding, anymore than you are responsible for the bad driving of every other motorist on the road. Keep in mind, that when a cyclist or group of cyclists "take the lane" by riding down the middle or not all the way to the right, that is not always illegal. In cases where the side of the road is full of debris or where the lanes are already narrow, the safest place for the cyclist to ride may be closer to the middle of the lane, and doing so forces cars to make sure they have room to safely pass before passing, instead of trying to squeeze by in a way that is inherently unsafe for the cyclist and often ends up with a cyclist in the ditch or worse.
If you don't like the cyclists riding where you drive, go to the next city council meeting and encourage them to construct roads with bike lanes or to institute reasonable policies to allow shared use of "bike paths" by bikes and pedestrians. Keep an eye out for TXDOT public meetings or solicitations for input on upcoming road projects and encourage them to account for bike use in their road planning. Much of the current issue on the west side of Houston as caused by Steve Raddack's long tenure as county commissioner, during which his engineering office adamantly opposed including planning for bikes in the construction of any roads under their purview. Many streets that had wide shoulders where bikes could safely ride were rebuilt as curb and gutter construction with no room for bikes, over the objections of cyclists who gave their input to TXDOT. Raddack's office consistently pointed to the "bike paths" in the parks as alternate places for cyclists to ride instead of the streets. And now, in one of his last acts before leaving office, he implemented the 10 mph speed limits that have effectively banned cyclists" from using the "bike paths" he touted as an alternative to riding on the streets.