Oldschool F2P bans are very high. You would most likely have gotten banned with whatever bot tbh.
Jagex must have a really good detection rate then, or the bot in this case is particularly bad with anti-randoms, anti-patterns etc, anti-ban. Like I have mentioned I cannot confirm if it was this bot that got me banned as I was using others prior for a short duration.
I get that more people probably bot on F2P, thus is assumed I am a botter but there is no proof I am a botter if the bot was good enough in the first place, there would be nothing to detect, if there is nothing to detect, you don't get banned.
Clearly in this case Jagex picked up on very suspicious behaviour.
When using the script I personally thought it looked very suspicious just watching it (my negligence to let it continue really) quite a few times it ran behind the bank, it right clicks on the bank X to bring the right click menu up to close the bank window (who does that?), it can be very slow to click a tree, on a few occasions clicked a tree just as it disappeared and stood there few quite a bit longer than you realistically would in real life.
I did also have a couple small issues where it did not detect the axe, and tried getting a bronze one out of the bank but stopping and restarting it standing near the willows resolved this problem. I also had an issue where it got to the bank and stood there not actually opening the bank, again restarting the script resolved this.
Take the above as constructive criticism from a user. It's disappointing that I have been banned but I always knew the risks.