I hate when people dont say thank you

Like when I was in the hospital i gave this one girl a soduku page and she just said okay. I should have taken it back right then but I didn't wanna start drama. And I went onto a roblox obby and told them stage 38 is cyan pink cyan and nobody said anything, and they were actively chatting so I know they saw my message. Like if you dont appreciate something enough to say thank you, reject it. Not saying thank you is extremely disrespectful and ungrateful.