If a trucker is merging into your lane like that, they probably have good reason.
Example:
Two lane interstate/highway, approaching an on ramp with vehicles attempting to merge in.
Trucker moves over into your lane to let them in.
And then there’s you, side-by-side with a multi-ton cargo machine because…why?
Lack of situational awareness? Did the off ramp not clue you in to the fact that an on ramp is approaching and that there may be other vehicles looking to merge in and that the trucker may need to move over to let them in?
Maybe you (and probably the 3+ cars ahead of you) thought they could all over take the semi and merging traffic all at once?
TL;DR you’re probably the dumb ass.
Your literacy skills are on show here.
Probably best to leave the Glock at home, friend.