My thoughts on the finale and show in general
I used to defend this show, but ever since the "not a love triangle" drama, I wasn't interested in the show anymore. I just watched as a casual viewer not really caring about what happened. That is probably when I realized how unrealistic the show. Have you ever run into middle school or high school kids that talk like the kids in this show?
Teen 1: Let's go this magical window in my room that makes everyone say their deepest thoughts!
Teen 2: Sure, that makes perfect sense.
Or:
They just talk about how complex life is.
I was also getting annoyed at parts of the fandom treating the show/franchise as perfect and anything bad could be blamed on Disney Channel. When the pilot for GMW came out, everyone was saying "Give it some time, it needs time to set it's footing". Whenever a new show has a pilot: "AHHH, CANCEL IT NOW, THAT FILTH HAS NO RIGHT BEING AIRED ANYWHERE NEAR GIRL MEETS WORLD". Also, they feel they have the right to hate on all other Disney shows, but act like it's a sin if you say anything negative about GMW.
Thoughts on the finale:
The "move to London" plot point was pointless. They set it up as a big cliffhanger in "Sweet Sixteen", but the fact that the cast/crew where hoping for a renewal, I pretty much knew Topanga was going to refuse the offer. The final episode was like 20 minutes of Riley saying goodbye to everyone and the final two minutes was "Never mind" and "Let's have a connection to the BMW in case we don't get renewed." "By connection I mean let's have a flashback to Cory's monolouge to Joshua from that episode and repeat it word for word to the GMW characters - including the meta joke at the end becuase having the same joke back to back is obviously hilarious!"
A joke in another Disney show recently, in that new show "Bizaardvark", reminded me straight away of Girl Meets World:
This girl was watching an in-universe terrible movie called "Keyboard Camp" and you hear one line of dialouge from the movie "The thing about keyboard camp, Brendan, is that when you're friends here, you're friends for life."
Right when I heard that line, all I could think of was Riley and Maya talking about how "We're going to be friends forever!" and "We're never going to leave each other!"
Connecting to my earlier point of the fandom hating on other shows, Bizaardvark also recently had an episode dealing with the overall lesson "Even if you feel a show is stupid, that doesn't mean there aren't people out there that love it just as much as you loved another show." To me, that lesson felt more relatable to people these days then anything GMW has taught.