I think it's time for a movie title with Rise in it, maybe Rise of Galvatron
Amen Brother!
I've enjoyed the movie we have got for what they are, sure there are issues with all of them but there are issues with every movie that's ever been released. I also don't see them as a part of G1 continuity or any other, they are their own haphazard continuity with their own albeit shallow characters.
I don't think the transformers universe is big enough for a MCU style tied together string of movies. we have 30 years of several different toy/show lines that revolve around pretty much the same topic with variations. the Marvel started in 1939 as Timely Publications with Marvel as it's modern self dating back as far as 1961, nearly 60 years of stories ranging between everything from a guy in a flying metal suit, a dude made from rock and a talking raccoon. They have the depth to produce 10 movies that are nothing like each other. Transformers is always going to have giant robots.
For the moment Transformers movies are enjoyable popcorn flicks and they will probably stay that way while they're making as much money as they have been. I would hate to see them start to take themselves too seriously and actually lose profit and stop being made as a result. as soon as the brand starts to look unprofitable, we'll start getting less of the good stuff that we do get.
Maybe in ten or fifteen years we'll see it rebooted in a manner similar to batman. With G1 story and designs that work on the big screen, deep characterisation and less fart jokes.
When I was younger, I always felt that Pixar could do a good job of a Transformers movie.