What is wrong with those images? Did he claim to make them himself? Images with copyrights have watermarks anyways, and his topic is of an informative nature, and one of them has a data source.
Did you claim that you wrote this shitpost yourself?
Generally we don't do that, it's the implied default unless stated otherwise. And it's not about copyright. Copying something that's not protected by copyright/watermark/etc would still be plagiarism.
The "data source" is referring to part of the data (market cap information) that Bloomberg used in the chart, it has nothing to do with Ratimov lifting Bloomberg's work and posting here without reference.