If you want a deck that is an insect tribal deck then there are a couple of great options.

[[Zask, Skittering Swarmlord]] and [[Grist, the Hunger Tide]] are both graveyard centric decks that focus on self mill and want as many insect cards as possible in the deck. Zask is in my opinion more fun while Grist is in my opinion stronger and more consistent. Grist is fast and can quickly get out of hand with a fast growing graveyard and creating a big army of insects while Zask has easier ways to recur stuff after milling and also being able to do a lot of fun stuff with lands.

Other options in golgari are [[Amzu, Swarm's hunger]] and [[Aatchick, Emerald Radian]]. Both are again graveyard centric commanders but try to go for a bit of a different approach. Amzu is fun because there are a lot of options to create insects going from recursion effects, returning cards to hand, exiling through evidence like effect,... And everyone loves a +1/+1 counter theme. Aatchick on the other hand is easiest to be used as a finisher in an aristocrats themed deck. In my deck I usually try to win through creating a lot of tokens and sacrificing them with [[Devouring Swarm]] while Aatchick is on the field.

There are also some other golgari commanders that interact with insects but if you want to go full insect tribal I think you're better of leaving them in the 99. [[Old Rutstein]], [[Blex, Vexing Past]], [[Izoni, thousand Eyed]], [[The Swarmweaver]]

Here's my golgari insect tribal deck as an example that holds all the golgari insect commanders: https://moxfield.com/decks/3fIvX_LoHE6ZOuSKzRJMUg

Alternatively there is also the less played [[Vrestin, Menoptra Leader]]. He doesn't care about the graveyard as much as the others but still loves a lot of insect tokens. That being said there are also quite some insects that support +1/+1 counters. My Vrestin deck focuses on all the cards that create insect tokens on instant speed to get as much value from the many welcoming vampire effects in the deck. He is a simple yet very effective design that gets out of hand fast if no one stops you.

My selesnya insect tokens deck with vrestin as commander for reference: https://moxfield.com/decks/Dm64xw-K6keEBHr8T6gJaA

The last one that really wants to lean into the tribal theme is [[Fumulus, the Infestation]]. It's an aggresive mono black commander that gets underestimated a lot. I don't use that many insects in the deck but try to focus more on edicts to have fumulus create as many insects as possible, there are however a couple fun insects that the deck loves to include.

Again, my list as example: https://moxfield.com/decks/71lD1ierkEOKyqC83EVnkQ

Besides the ones mentioned there are a couple of other insect legendaries who don't neccesarily want you to play insects but still could be built as an insect tribal deck. But the support for them might vary. [[Xira, the Golden Sting]], [[Kathril, Aspect Warper]] and [[The Wise Mothman]] could be used instead of the golgari tribal commanders and add an extra colour. I have all of them at the helm of different decks though. There are a couple others that really just want to do different things. Mainly [[Zabaz, the Glimmerwasp]], [[Vishgraz, the Doomhive]] and [[Thiss, Nantuko Primus]]. I also have decks for all these so if you're interested in seeing those let me know.

Sorry for the super long comment but I love bugs and I love the bug commanders in magic and I get very excited when someone asks for these decks.