Social Proof Section using basic HTML and CSS alongside Bootstrap

Q1 Are there any best practices especially in using Bootstrap?

Q2 Bootstrap makes even the text in tags responsive. How can I prevent that?

Q3 Making this without Bootstrap would have taken longer but be more accurate. How do I force it to create one breakpoint rather than *-sm *-md *-lg breakpoints?

Q4 Is Bootstrap only good for responsive grid layouts or am I using it wrong?

Q5 How do I efficiently add <svg> elements to my HTML?

Q6 How do I set the background <svg> for the page and change it depending on desktop or mobile layout?