@yuvynuya you should leave the client setting default alone [it always find a way regardless of torrent client]
Speed relies on your bandwidth:
If you're the only seeder you'll get 100% transfer rate base on you bandwidth.
According to the torrent 151/136 s/l ratio, it doesn't mean that 136 are actual seeding/leeching [most of them are partial seeder w/c means they already grab the files they wanted so they are no longer downloading...This is some form of competing bandwidth and most part of it they already rich the maximum transfer data rate...The only way you can distribute your speed [more chances] if the torrent started 'til 50% while on distribution until completed.
Also VPN users affects peers connectivity [not recommended for disabling] w/c affects peers/swarm.