If you didn't know any better, one might find it kind of peculiar that far fewer people tend to raise any objection to two of the other major scientific theories of the 19th century: Germ Theory of Disease as demonstrated by Louis Pasteur and Robert Koch in identifying pathogenic microorganisms as the cause of specific illnesses which largely established the field of Microbiology in the process; and the often mentioned (by me) Dynamical Theory of the Electromagnetic Field by James Clerk Maxwell, the classical foundation of electromagnetism which underpins all electric, radio and optical technologies.
There's a nearly endless number of individual discoveries and things which are known and verified, there's physical constants, there's principles and general laws which are ascribed and hold to a specific set of conditions, but an established scientific theory? In the modern sense, that's an entire framework of knowledge and explanation of some aspect of the natural world based on a body of facts which are repeatedly confirmed by observation and experiment with the capability of bringing new discoveries to light. Achievements in human endeavor probably don't get any greater.
I do think some unnecessary confusion does come with terminology when things such as "superstring theory" are thrown around because it isn't, it's a hypothesis albeit a rather educated and elaborate one. Amusingly, if it was called the Law of Evolution (or say, Law of General Relativity) people would probably perceive them as being more authoritative and of a higher degree of seriousness FFS. As the definitions actually are, that would be totally nonsensical. They're levels above, describe and account for a lot more than laws do which is deliciously ironic given the "only a theory" mantra.