A pilot reported ATC Tower cleared another aircraft to land while over the threshold when their aircraft was exiting the runway opposite direction to landing traffic and not past the hold short lines.

Narrative

Operating flight to TQPF airport with passengers. While landing at TQPF; I entered a right down wind for runway 29. I reported midfield right downwind and was cleared to land runway 29. I heard a flight; contact tower for landing on 29. Tower reported my position as two mile right base and the aircraft was instructed to report me insight and to follow for runway 29. The aircraft stated that he had me on TCAS and would follow. I never heard the aircraft report me insight. Upon landing; I rolled past all taxiways and was instructed to make a 180 degree turn and backtrack to taxiway Bravo. When I completed the 180 degree turn I noticed the aircraft was making a very short approach approx. 1/4 mile; 200 ft. AGL in a steep bank. Tower controller attempted to give different instructions that were difficult for me to understand; eventually giving the instruction; 'expedite to Bravo.' When completing the turn I was approx. 500 ft from taxiway Bravo. As I approached Bravo; the aircraft now 50 ft. AGL over the threshold requested permission to land. The tower cleared the aircraft to land. I was not completely past the hold short marks for runway 29 when the aircraft touched down. The pilot of the aircraft made an aggressive and unstable approach without having me insight. This pilot jeopardized the safety of his passengers and my passengers. Tower did not verify that the aircraft had me in sight and did not provide proper separation; and did not instruct the aircraft to execute a Go-Around. Suggestion: Tower needs to provide better separation and instruct Go-Arounds when safety is compromised.