Date: 202103
Local time of day: 1201-1800
Location: ZZZ.TRACON, US
Aircraft: Small Transport
Flight plan: IFR
Flight phase: Descent
Airspace: Class E ZZZ
ATC / advisory: TRACON ZZZ
Second aircraft: Large Transport; Low Wing; 2 Turbojet Eng
Reporter organization: Government
Reporter function: Approach
Reporter qualification: Air Traffic Control Fully Certified
Human factors: Workload; Situational Awareness
Anomaly: ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Detector: Person Other Person; Person Air Traffic Control
When detected: In-flight
Result: Air Traffic Control Issued New Clearance
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: Aircraft X was on vector to RWY XX off the downwind. Ceiling was marginal; but I was confident I would get the airport in sight; at least by 070. I vectored Aircraft X in front of Aircraft Y on the straight-in. This situation happened less than 10 minutes prior to another report I just filed with a pilot deviation so I was already frazzled from that. I turned Aircraft X heading 090; they did not respond; immediately re-keyed 'Aircraft X; heading 080.' The pilot read back correctly. They were level 080. My vector had the aircraft practically straddling the 080/070 MVA line. My PTL (Projected Track Line) showed a left turn; I descended Aircraft X to 070. Almost immediately; the aircraft showed a right turn. I immediately corrected Aircraft X to a 070; realized I had given the descent and tried to stop at 080. The aircraft went to 075 in a 080 MVA. At this point; Aircraft Y is going to run them over; so I turn Aircraft X south at 080. I didn't have time to exchange traffic and he would pass about 2nm West. As Aircraft Y was approaching ZZZZZ; I cleared the aircraft for the approach even though they were not yet tail to tail because I knew the aircraft wouldn't descend quite yet. When I saw the aircraft side by side; I climbed Aircraft to 090 because 7nm south; Restricted Area XXXX was active to 090. Upon review; Aircraft X showed 081 and I was informed I had a LoSS [Loss of Separation Standards]  in addition to three separate pilot deviations.I guess I should have waited a second longer to climb Aircraft X; that would have prevented the LoSS; however; delaying any more could have put him in an unsafe situation with the Restricted Area where they are shooting artillery. I truly showed the aircraft side by side and waited as long as I could to climb to ensure I would clear Aircraft X; I thought I was legal. Choose the lesser of the evils. I truly thought I had crossing/diverging. I wish I wouldn't have descended the Aircraft X to 070 either; but he read back the turn; I saw the turn start with the PTL and pushed him down because I needed to with Aircraft Y coming fast behind; and already being extended from Aircraft Z I had to break off in the earlier situation. The fact I have two back-to-back pilot deviations; one go-around from it; and when I go on break and have to spend my break doing a report; to then be told I had a LoSS; rather than even giving me even a few seconds to get my bearings is why management in this facility is worthless. Back to back; high stress situations; and we would rather tell you that you [are no good] at your job rather than good job; or are you doing okay even. I'm not mad at them calling the LoSS; I take responsibility for observing my scope wrong since. I'm upset that rather than even attempting to care about their employees; they immediately try to make them feel worse.




Synopsis: TRACON Controller reported a loss of separation occurred and one of the aircraft descended below the minimum altitude for the sector. Controller stated they had two pilot deviations shortly before this and the event caused added stress.