Lakes that stop producing

[artesian]

First off new here and glad I found this forum. Just to get an idea of what I fish is the lakes that I hope to see no one else on during the day. So I am a back water guy with a canoe looking at waters less than give or take 15 or so acres. Had a body up in Sussex that was a honey hole for the longest time. Type of lake that had a great mix of 12" to 20"+ bass. Big ones weren't a guarantee but you'd always catch in the 15+ range of fish on a trip. Last 5 years and especially last 2 the numbers have tanked. Granted in that time the pressure there has increased alot where you might see 3-4 others on the water with you. This year the lake bottomed out with lucky getting a couple bass in the 12" range. Being I didn't see but 3 other people try there I think everyone who goes there knows something is up. My buddy theorizes that the lake got crappied and they are now they dominate fish there. Which I have a hard time believing. I did see the weed choke is gotten to the point where you only have maybe two foot of clear water in the spots where open enough to fish. My personal theory is that last year and this years summers are hotter than I can recall and this is not a particularly deep lake. I'm guess that coupled with the weed choke has just cut down on the population. Curious if anyone has seen a honey hole just completely turn off like that? I know lakes cycle but the quickness in the way this happened still has me scratching my head on what went wrong.