This is someone that exclusively post on the shit post community, so I wouldn't take them seriously.

The meme is saying that lgbtqia+ folks should not use the word queer because it is the tool of the homophobic and transphobic.

Oscar Montoya had a good take that I'll roughly paraphrase, which is that queer let's you fit where you are without needing to define yourself for others' convenience. Looking at the community as a queer community also helps to keep others from dividing us with shit like "LGB without the T".