I didn't say to remove building, I said to give more engaging and valid counterplay to the strategy. As it stands, building is basically the king of all play and there's no real alternative options given to the player. That's where explosives and other mobility options come in to give players more choice while retaining building as a valid style of play as well. And then you can do little things like reduce building spam (such as not letting someone replace the same build a certain number of times, think putting up the same wall while you unload clip after clip trying to get to them without explosives) or maybe limit how much can be built in a certain time frame (you can't just spam walls as you're running away).
As it stands, I just find building is too strong with virtually no negative consequences to the player other than not being able to build more later on and MAYBE a chance of falling to your death if the structure is poorly rooted AND easily knocked down AND you don't have gliders. Not every game in Fortnite has to be a building battle all the damn time because there are enjoyable mechanics in other places that often get completely ignored for "just build bro."
There are plenty of alternatives. Explosives (grenades, rocket & grenade launchers) will drop people down, grapple gun and bounce bombs can jump you up to the hyperactive builders without the need to put down a single piece of wood/stone/metal (and bounce bombs can also break structures really easily), proximity bombs can kill tower campers when used wisely. The game used to have even more but dumb Epic removed lots of stuff that were "pro approved" (or at least tolerated) that could help with getting to hyperactive builders (rift-a-fucks, hamster balls, quad bikes etc.).
There are also some pro glitches that can push you into cubes if someone tries to box themselves in.
People (not just pros) justifiably complained about stuff like the infinite redeployment & initial planes because they were poorly balanced. Infinite redeployment didn't help new playera, it helped pros move around with too much ease and sweep over lesser players like a tsunami because they could move around so easily. The planes were initially highly durable, their guns were just too accurate & deadly, they wrecked structures without a single scratch and allowed pro players to prey on weaker ones. People complained about them a lot less after they made a few adjustments. You could still do some damage to structures or make strategic drops to tall structures but you weren't an unstoppable flying bulldozer tank that takes forever to shoot down.
The problem with these was mostly only really in the basic game modes. They are one and done, so anything that feels cheap will just make those super frustrating and unfun to play. It's not fun to gather weapons & mats and wander around for 10-15 minutes, get into a fire and build fight and then have some asshole 3rd party swoop in and drop both of you down to your deaths by just simply flying through your structures. Might be fun to the one doing the flying but it's extremely frustrating to the ones on the receiving end of such cheap kills.
It's not as bad in Team Rumble because you'll just spawn again with all your weapons and materials but for something where a single round can be anywhere from 3 to 20+ minutes, it sucks ass to die to such cheap, badly balanced gimmicks that you can't counter.