The 29-year-old centre-back has emerged as a key figure under coach Arthur Zwane, making over appearances across all competitions - the most he has featured in a single campaign.
It marks a significant turnaround for Mthethwa, who struggled for minutes during his time at Orlando Pirates and had to rely on loan spells to get regular football.
Reflecting on his resurgence, the defender admitted the opportunity to play consistently has made a major difference to both his confidence and performance levels.
"Personally, I think for me this is one of my greatest seasons. Coming from two seasons where I've not been playing," Mthethwa said, as quoted by iDiski Times.
"I appreciate the opportunity from the chairman and the technical team for trusting me."
Mthethwa highlighted the importance of rhythm and match fitness, noting that regular involvement has allowed him to rediscover his form and continue developing.
"I think I've achieved playing almost 20-plus games this season. I've achieved a lot, but I'm still learning," he added.
While pleased with his individual progress, the defender admitted there is still unfinished business for the team after narrowly missing out on a place in continental competition.
AmaZulu were in contention for a CAF spot but ultimately fell short, something Mthethwa believes can serve as motivation going forward.
"I think next season is one of the goals because we set a standard that we can challenge for that," he said.
Mthethwa will now look to maintain his strong form when AmaZulu face Kaizer Chiefs at Moses Mabhida Stadium on Saturday.
Bafana Bafana will officially announce their final squad for the 2026 FIFA World Cup on May 27 at the Union Buildings in Pretoria, according to South African Football Association (SAFA) president Danny Jordaan.
Former Kaizer Chiefs head coach Ernst Middendorp has weighed in on the ongoing title race debate, suggesting that fixture scheduling may have handed Orlando Pirates an edge over Mamelodi Sundowns.
AmaZulu will be hosting Kaizer Chiefs in a Betway Premiership clash at the Moses Mabhida Stadium on Saturday, as they look to secure position four on the table.
Orlando Pirates may be circling, but for now, Ayabulela Maxwele remains firmly focused on his resurgence at Lamontville Golden Arrows.
